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  • 1
    Keywords: Physics ; History ; Nuclear physics ; Heavy ions ; Hadrons ; Particle acceleration ; Physics ; Nuclear Physics, Heavy Ions, Hadrons ; History and Philosophical Foundations of Physics ; Particle Acceleration and Detection, Beam Physics ; History of Science
    Description / Table of Contents: Part I Reminiscences: Rolf Hagedorn and Relativistic Heavy Ion Research.-- Part II The Hagedorn Temperature --- Part III Melting Hadrons, Boiling Quarks Heavy Ion Path to Quark-Gluon Plasma --- Acronyms
    Pages: Online-Ressource (XVI, 441 pages)
    ISBN: 9783319175454
    Language: English
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  • 2
    Keywords: Physics ; Mathematical physics ; Quantum physics ; Physics ; Quantum Physics ; Mathematical Applications in the Physical Sciences ; History and Philosophical Foundations of Physics
    Description / Table of Contents: I The Cellular Automaton Interpretation as a general doctrine: Motivation for this work --- Deterministic models in quantum notation --- Interpreting quantum mechanics --- Deterministic quantum mechanics --- Concise description of the CA Interpretation --- Quantum gravity --- Information loss --- More problems --- Alleys to be further investigated and open questions --- Conclusions --- II Calculation Techniques: Introduction to part II --- More on cogwheels --- The continuum limit of cogwheels, harmonic rotators and oscillators --- Locality --- Fermions --- PQ theory --- Models in two space-time dimensions without interactions --- Symmetries --- The discretised Hamiltonian formalism in PQ theory --- Quantum Field Theory --- The cellular automaton --- The problem of quantum locality --- Conclusions of part II --- Some remarks on gravity in 2+1 dimensions --- A summary of our views on Conformal Gravity --- Abbreviations.
    Pages: Online-Ressource (XVIII, 298 pages) , 21 illustrations, 19 illustrations in color
    ISBN: 9783319412856
    Language: English
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  • 3
    Keywords: Physics ; History ; Nuclear physics ; Heavy ions ; Hadrons ; Particle acceleration ; Physics ; Nuclear Physics, Heavy Ions, Hadrons ; History and Philosophical Foundations of Physics ; Particle Acceleration and Detection, Beam Physics ; History of Science
    Description / Table of Contents: Part I Reminiscences: Rolf Hagedorn and Relativistic Heavy Ion Research.-- Part II The Hagedorn Temperature --- Part III Melting Hadrons, Boiling Quarks Heavy Ion Path to Quark-Gluon Plasma --- Acronyms
    Pages: Online-Ressource (XVI, 441 pages)
    ISBN: 9783319175454
    Language: English
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  • 4
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    Berlin, Heidelberg : Springer
    Keywords: Mathematics ; Computer graphics ; Dynamics ; Ergodic theory ; Functions of complex variables ; Differential geometry ; Physics ; Mathematics ; Differential Geometry ; Functions of a Complex Variable ; Dynamical Systems and Ergodic Theory ; Computer Graphics ; Numerical and Computational Physics
    Description / Table of Contents: Discrete conformal maps: Boundary value problems, circle domains, Fuchsian and Schottky uniformization: Alexander I. Bobenko, Stefan Sechelmann, Boris Springborn --- Discrete complex analysis on planar quad-graphs: Alexander I. Bobenko and Felix Günther --- Approximation of conformal mappings using conformally equivalent triangular lattices: Ulrike Bücking --- Numerical Methods for the Discrete Map Za: Folkmar Bornemann, Alexander Its, Sheehan Olver, and Georg Wechslberger --- A variational principle for cyclic polygons with prescribed edge lengths: Hana Kourimská, Lara Skuppin, Boris Springborn --- Complex Line Bundles over Simplicial Complexes and their Applications: Felix Knöppel and Ulrich Pinkall --- Holomorphic vector fields and quadratic differentials on planar triangular meshes: Wai Yeung Lam, Ulrich Pinkall --- Vertex normals and face curvatures of triangle meshes: Xiang Sun, Caigui Jiang, Johannes Wallner, and Helmut Pottmann --- S-conical cmc surfaces. Towards a unified theory of discrete surfaces with constant mean curvature: Alexander I. Bobenko and Tim Hoffmann --- Constructing solutions to the Björling problem for isothermic surfaces by structure preserving discretization: Ulrike Bücking and Daniel Matthes --- On the Lagrangian Structure of Integrable Hierarchies: Yuri B. Suris, Mats Vermeeren --- On the variational interpretation of the discrete KP equation: Raphael Boll, Matteo Petrera, and Yuri B. Suris --- Six topics on inscribable polytopes: Arnau Padrol and Günter M. Ziegler --- DGD Gallery: Storage, sharing, and publication of digital research data: Michael Joswig, Milan Mehner, Stefan Sechelmann, Jan Techter, and Alexander I. Bobenko
    Pages: Online-Ressource (X, 439 pages) , 114 illustrations, 67 illustrations in color
    ISBN: 9783662504475
    Language: English
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  • 5
    Keywords: Physics ; Mathematical physics ; Quantum physics ; Physics ; Quantum Physics ; Mathematical Applications in the Physical Sciences ; History and Philosophical Foundations of Physics
    Description / Table of Contents: I The Cellular Automaton Interpretation as a general doctrine: Motivation for this work --- Deterministic models in quantum notation --- Interpreting quantum mechanics --- Deterministic quantum mechanics --- Concise description of the CA Interpretation --- Quantum gravity --- Information loss --- More problems --- Alleys to be further investigated and open questions --- Conclusions --- II Calculation Techniques: Introduction to part II --- More on cogwheels --- The continuum limit of cogwheels, harmonic rotators and oscillators --- Locality --- Fermions --- PQ theory --- Models in two space-time dimensions without interactions --- Symmetries --- The discretised Hamiltonian formalism in PQ theory --- Quantum Field Theory --- The cellular automaton --- The problem of quantum locality --- Conclusions of part II --- Some remarks on gravity in 2+1 dimensions --- A summary of our views on Conformal Gravity --- Abbreviations.
    Pages: Online-Ressource (XVIII, 298 pages) , 21 illustrations, 19 illustrations in color
    ISBN: 9783319412856
    Language: English
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  • 6
    Unknown
    Berlin, Heidelberg : Springer
    Keywords: Mathematics ; Computer graphics ; Dynamics ; Ergodic theory ; Functions of complex variables ; Differential geometry ; Physics ; Mathematics ; Differential Geometry ; Functions of a Complex Variable ; Dynamical Systems and Ergodic Theory ; Computer Graphics ; Numerical and Computational Physics
    Description / Table of Contents: Discrete conformal maps: Boundary value problems, circle domains, Fuchsian and Schottky uniformization: Alexander I. Bobenko, Stefan Sechelmann, Boris Springborn --- Discrete complex analysis on planar quad-graphs: Alexander I. Bobenko and Felix Günther --- Approximation of conformal mappings using conformally equivalent triangular lattices: Ulrike Bücking --- Numerical Methods for the Discrete Map Za: Folkmar Bornemann, Alexander Its, Sheehan Olver, and Georg Wechslberger --- A variational principle for cyclic polygons with prescribed edge lengths: Hana Kourimská, Lara Skuppin, Boris Springborn --- Complex Line Bundles over Simplicial Complexes and their Applications: Felix Knöppel and Ulrich Pinkall --- Holomorphic vector fields and quadratic differentials on planar triangular meshes: Wai Yeung Lam, Ulrich Pinkall --- Vertex normals and face curvatures of triangle meshes: Xiang Sun, Caigui Jiang, Johannes Wallner, and Helmut Pottmann --- S-conical cmc surfaces. Towards a unified theory of discrete surfaces with constant mean curvature: Alexander I. Bobenko and Tim Hoffmann --- Constructing solutions to the Björling problem for isothermic surfaces by structure preserving discretization: Ulrike Bücking and Daniel Matthes --- On the Lagrangian Structure of Integrable Hierarchies: Yuri B. Suris, Mats Vermeeren --- On the variational interpretation of the discrete KP equation: Raphael Boll, Matteo Petrera, and Yuri B. Suris --- Six topics on inscribable polytopes: Arnau Padrol and Günter M. Ziegler --- DGD Gallery: Storage, sharing, and publication of digital research data: Michael Joswig, Milan Mehner, Stefan Sechelmann, Jan Techter, and Alexander I. Bobenko
    Pages: Online-Ressource (X, 439 pages) , 114 illustrations, 67 illustrations in color
    ISBN: 9783662504475
    Language: English
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  • 7
    Keywords: Environment ; Climate change ; Remote sensing ; Physics ; Environment ; Climate Change ; Remote Sensing/Photogrammetry ; Energy Efficiency ; Climate Change/Climate Change Impacts ; Applied and Technical Physics
    Description / Table of Contents: Part I The Urban Heat Island – Evidence, Measures and Tools --- Forecasting Models for Urban Warming in Climate Change --- Assessment Indication and Gold Standard --- Methodologies for UHI Analysis --- Decision Support Systems for Urban Planning --- Part II Pilot Actions in European Cities --- Counteracting Urban Heat Islands: Solutions for European Cities.
    Pages: Online-Ressource (LIII, 400 pages) , 213 illustrations
    ISBN: 9783319104256
    Language: English
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  • 8
    Keywords: Environment ; Climate change ; Remote sensing ; Physics ; Environment ; Climate Change ; Remote Sensing/Photogrammetry ; Energy Efficiency ; Climate Change/Climate Change Impacts ; Applied and Technical Physics
    Description / Table of Contents: Part I The Urban Heat Island – Evidence, Measures and Tools --- Forecasting Models for Urban Warming in Climate Change --- Assessment Indication and Gold Standard --- Methodologies for UHI Analysis --- Decision Support Systems for Urban Planning --- Part II Pilot Actions in European Cities --- Counteracting Urban Heat Islands: Solutions for European Cities.
    Pages: Online-Ressource (LIII, 400 pages) , 213 illustrations
    ISBN: 9783319104256
    Language: English
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  • 9
    Keywords: Physics ; Quantum optics ; Physics ; Optics, Lasers, Photonics, Optical Devices ; Quantum Optics ; Popular Science in Physics ; History and Philosophical Foundations of Physics
    Description / Table of Contents: History --- A brief history of light --- Ibn Al-Haitham – Father of modern optics --- Optical Sources --- Femtosecond light --- Laser --- LED light --- Electron optics --- Applications --- Biophotonics --- Optical communication --- Optical astronomy --- Solar cells --- Optics in Remote Sensing --- Optics in nanotechnology --- Optics in art --- Eye --- Optics in medicine --- Optical illusions --- Quantum Optics --- Optical tests of foundations of physics --- Nonlinear Optics: Historical Perspectives and New Opportunities --- Quantum communication --- Nature of photon --- Atom optics --- Coherent effects: From EIT to slow light
    Pages: Online-Ressource (XX, 504 pages) , 355 illustrations, 277 illustrations in color
    ISBN: 9783319319032
    Language: English
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  • 10
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-07-08
    Description: After many years of delays, the €1.7 billion Facility for Antiproton and Ion Research, an extension of the GSI Helmholtz Center for Heavy Ion Research near Darmstadt, Germany, may finally get built. At a council meeting on 27 and 28 June, the partner countries—eight European Union members plus India and Russia—concluded that they have enough money to cover a €320 million budget gap; they will now seek building permits from the German government. Still, some countries have yet to commit their share of the missing cash, including Russia, which had agreed to bear about 18% of FAIR's total construction cost, the second largest contribution after Germany's 70%. Author: Edwin Cartlidge
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 11
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-05-27
    Description: Author: Jelena Stajic
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-07-15
    Description: Author: Jelena Stajic
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 13
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-07-22
    Description: Author: Ian S. Osborne
    Keywords: Physics
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 14
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-04-08
    Description: Author: Jelena Stajic
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 15
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-25
    Description: Density functional theory (DFT) stands out from all first-principles quantum mechanical methods for the simulation of materials, as it enables very good approximations for the complicated components of electronic motion called exchange and correlation. DFT is the method of choice for many materials simulations because of the availability of general-purpose programs that can perform calculations on any material. Results obtained with one DFT program need to be reproducible by any of the other DFT programs, and this has not been straightforward up to now. On page 10.1126/science.aad3000 of this issue, Lejaeghere et al. (1) describe an extensive effort by developers of the major solid-state DFT codes to provide a unified and reproducible benchmark of precision for their calculations based on a reliable criterion, the so-called Δ gauge. Using the Δ gauge, the authors found that the level of precision that can be achieved today in DFT calculations of elemental crystalline solids is comparable to the precision of the most advanced techniques for experimental measurement of the properties of materials. The work leads to the conclusion that the DFT simulation of elemental crystalline solids is a (computationally) solved problem, but also poses the question of whether we can achieve the same levels of validation and reproducibility for more complex simulations of materials involving several elements and/or several methods. Author: Chris-Kriton Skylaris
    Keywords: Physics
    Print ISSN: 0036-8075
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  • 16
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-07-01
    Description: The photoemission of electrons from atoms, molecules, and condensed matter provides the experimental basis of our understanding of electronic structure. During the process of photoemission, a sufficiently large quantum of electromagnetic radiation (a photon) is absorbed by matter and converted into an electronic excitation, promoting a bound electron into a final state above the vacuum energy Evac. In photoemission spectroscopy, the kinetic energy and momentum of electrons in such final states are analyzed after their propagation to a distant detector. To determine the electronic structure of the sample, the “sudden approximation” has to be fulfilled, whereby the photoelectron leaves the sample fast enough, without further interaction with the remaining electronic structure. On page 62 of this issue, Tao et al. (1) provide unprecedented insight into final-state dynamics by measuring the time a photoelectron takes to leave a solid material for characteristically different final states. By comparing an electron excited to a final state of a nickel solid Ψ Nif with one excited to a state of vacuum Ψ vacf, they establish that a photoelectron resides in the final state for 200 attoseconds (as) (2 × 10−16 s) before it leaves the nickel (see the figure). Such time scales would still allow for the electron to interact with its surroundings and, thus, are relevant for the validity of the sudden approximation. Authors: Uwe Bovensiepen, Manuel Ligges
    Keywords: Physics
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  • 17
    Publication Date: 2016-08-13
    Description: Author(s): Kostas Glampedakis, George Pappas, Hector O. Silva, and Emanuele Berti In this paper, a previously developed formalism, where all possible deviations, due to modified gravity from the structure of compact stars in general relativity, have been classified in a parametrized phenomenological form, has been used to deal with the stellar exterior. Several potential astrophysical observables, e.g. the surface redshift, have been computed for future use. [Phys. Rev. D 94, 044030] Published Fri Aug 12, 2016
    Keywords: General relativity, alternative theories of gravity
    Print ISSN: 0556-2821
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  • 18
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    American Physical Society (APS)
    Publication Date: 2016-08-18
    Description: Author(s): Ichiro Oda We study Weyl symmetry (local conformal symmetry) in unimodular gravity. It is shown that the Noether currents for both Weyl symmetry and global scale symmetry vanish exactly as in conformally invariant scalar-tensor gravity. We clearly explain why in the class of conformally invariant gravitational… [Phys. Rev. D 94, 044032] Published Wed Aug 17, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 19
    Publication Date: 2016-08-12
    Description: Author(s): Alexander K. Ridgway and Mark B. Wise We discuss the physical interpretation of stress-energy tensors that source static spherically symmetric Kerr-Schild metrics. We find that the sources of such metrics with no curvature singularities or horizons do not simultaneously satisfy the weak and strong energy conditions. Sensible stress-ener… [Phys. Rev. D 94, 044023] Published Thu Aug 11, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 20
    Publication Date: 2016-08-12
    Description: Author(s): Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Mukohyama, Shinji Tsujikawa, and Ying-li Zhang We consider the finite interactions of the generalized Proca theory including the sixth-order Lagrangian and derive the full linear perturbation equations of motion on the flat Friedmann-Lemaître-Robertson-Walker background in the presence of a matter perfect fluid. By construction, the propagating … [Phys. Rev. D 94, 044024] Published Thu Aug 11, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 21
    Publication Date: 2016-08-20
    Description: Author(s): Maarten van de Meent This paper presents the first calculation of the gravitational self-force on a small compact object on an eccentric equatorial orbit around a Kerr black hole to first order in the mass ratio. That is the pointwise correction to the object’s equations of motion (both conservative and dissipative) due… [Phys. Rev. D 94, 044034] Published Fri Aug 19, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 22
    Publication Date: 2016-08-20
    Description: Author(s): Dong-Gang Wang, Yang Zhang, and Jie-Wen Chen The spectrum of a relic gravitational wave (RGW) contains high-frequency divergences, which should be removed. We present a systematic study of the issue, based on the exact RGW solution that covers the five stages, from inflation to the acceleration, each being a power law expansion. We show that t… [Phys. Rev. D 94, 044033] Published Thu Aug 18, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 23
    Publication Date: 2016-08-24
    Description: Author(s): Arthur George Suvorov and Andrew Melatos The Ernst formulation of the Einstein equations is generalized to accommodate f ( R ) theories of gravity. It is shown that, as in general relativity, the axisymmetric f ( R ) field equations for a vacuum spacetime that is either stationary or cylindrically symmetric reduce to a single, nonlinear differen… [Phys. Rev. D 94, 044045] Published Tue Aug 23, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 24
    Publication Date: 2016-08-24
    Description: Author(s): Shahar Hod Charged rotating Kerr-Newman black holes are known to be superradiantly unstable to perturbations of charged massive bosonic fields whose proper frequencies lie in the bounded regime 0 〈 ω 〈 min { ω c ≡ m Ω H + q Φ H , μ } , where { Ω H , Φ H } are, respectively, the angular velocity and electric potential of the Kerr… [Phys. Rev. D 94, 044036] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 25
    Publication Date: 2016-08-24
    Description: Author(s): Sebastian Bahamonde, Mubasher Jamil, Petar Pavlovic, and Marko Sossich Motivated by recent proposals of possible wormhole existence in galactic halos, we analyze the cosmological evolution of wormhole solutions in modified f ( R ) gravity. We construct a dynamical wormhole that asymptotically approaches a Friedmann-Lemaître-Robertson-Walker (FLRW) universe, with supportin… [Phys. Rev. D 94, 044041] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 26
    Publication Date: 2016-08-24
    Description: Author(s): Hajime Sotani and Tomoya Takiwaki We examine the time evolution of the frequencies of the gravitational wave after the bounce within the framework of relativistic linear perturbation theory using the results of one-dimensional numerical simulations of core-collapse supernovae. Protoneutron star models are constructed in such a way t… [Phys. Rev. D 94, 044043] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 27
    Publication Date: 2016-08-24
    Description: Author(s): Sam R. Dolan and Jake O. Shipley We investigate the existence and phenomenology of stable photon orbits (SPOs) in stationary axisymmetric electrovacuum spacetimes in four dimensions. First, we review the classification of equatorial circular photon orbits on Kerr-Newman spacetimes in the charge-spin plane. Second, using a Hamiltoni… [Phys. Rev. D 94, 044038] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 28
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    American Physical Society (APS)
    Publication Date: 2016-08-24
    Description: Author(s): Shinya Tomizawa and Masato Nozawa We present an asymptotically flat supersymmetric black lens solution with the horizon topology L ( n , 1 ) = S 3 / Z n in the five-dimensional minimal ungauged supergravity. We show that the black lens carries a mass, two independent angular momenta, electric charge, and ( n − 1 ) magnetic fluxes, among which only… [Phys. Rev. D 94, 044037] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 29
    Publication Date: 2016-08-24
    Description: Author(s): Metin Gürses, Tahsin Çağrı Şişman, and Bayram Tekin A special class of metrics, called universal metrics, solves all gravity theories defined by covariant field equations purely based on the metric tensor. Since we currently lack the knowledge of what the full quantum-corrected field equations of gravity are at a given microscopic length scale, these… [Phys. Rev. D 94, 044042] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 30
    Publication Date: 2016-08-26
    Description: Author(s): Benjamin Elder, Justin Khoury, Philipp Haslinger, Matt Jaffe, Holger Müller, and Paul Hamilton Atom interferometry experiments are searching for evidence of chameleon scalar fields with ever-increasing precision. As experiments become more precise, so too must theoretical predictions. Previous work has made numerous approximations to simplify the calculation, which in general requires solving… [Phys. Rev. D 94, 044051] Published Thu Aug 25, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 31
    Publication Date: 2016-08-26
    Description: Author(s): Supakchai Ponglertsakul and Elizabeth Winstanley We present new soliton and hairy black hole solutions of Einstein–non-Abelian–Proca theory in asymptotically anti–de Sitter spacetime with gauge group su ( 2 ) . For static, spherically symmetric configurations, we show that the gauge field must be purely magnetic, and we solve the resulting field equat… [Phys. Rev. D 94, 044048] Published Wed Aug 24, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 32
    Publication Date: 2016-08-27
    Description: Author(s): Yasutaka Koga and Tomohiro Harada In the accretion flow of a fluid, its velocity may transit from subsonic to supersonic. The point at which such a transition occurs is called the sonic point and is often mathematically special. We consider the steady-state and spherically symmetric accretion problem of an ideal photon gas in genera… [Phys. Rev. D 94, 044053] Published Fri Aug 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 33
    Publication Date: 2016-08-27
    Description: Author(s): Adam Levi and Amos Ori The computation of the renormalized stress-energy tensor or ⟨ ϕ 2 ⟩ ren in curved spacetime is a challenging task, at both the conceptual and technical levels. Recently we developed a new approach to compute such renormalized quantities in asymptotically flat curved spacetimes, based on the point-splitt… [Phys. Rev. D 94, 044054] Published Fri Aug 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 34
    Publication Date: 2016-08-27
    Description: Author(s): Kinjalk Lochan, Sumanta Chakraborty, and T. Padmanabhan It is generally believed that, when matter collapses to form a black hole, the complete information about the initial state of the matter cannot be retrieved by future asymptotic observers, through local measurements. This is contrary to the expectation from a unitary evolution in quantum theory and… [Phys. Rev. D 94, 044056] Published Fri Aug 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 35
    Publication Date: 2016-08-30
    Description: Author(s): Stephen O’Sullivan and Scott A. Hughes In a previous paper, we developed tools for studying the horizon geometry of a Kerr black hole that is tidally distorted by a binary companion using techniques that require large mass ratios but can be applied to any bound orbit and allow for arbitrary black hole spin. We now apply these tools to ge… [Phys. Rev. D 94, 044057] Published Mon Aug 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 36
    Publication Date: 2016-08-31
    Description: Author(s): Nicolas Sanchis-Gual, Juan Carlos Degollado, Carlos Herdeiro, José A. Font, and Pedro J. Montero In a recent Letter [Sanchis-Gual et al. , Phys. Rev. Lett. 116 , 141101 (2016)], we presented numerical relativity simulations, solving the full Einstein–Maxwell–Klein-Gordon equations, of superradiantly unstable Reissner-Nordström black holes (BHs), enclosed in a cavity. Low frequency, spherical pert… [Phys. Rev. D 94, 044061] Published Tue Aug 30, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 37
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-06-24
    Description: Author: Jelena Stajic
    Keywords: Physics
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    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 38
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    American Physical Society (APS)
    Publication Date: 2016-08-11
    Description: Author(s): Teresa Bautista and Atish Dabholkar We consider a Weyl-invariant formulation of gravity with a cosmological constant in d -dimensional spacetime and show that near two dimensions the classical action reduces to the timelike Liouville action. We show that the renormalized cosmological term leads to a nonlocal quantum momentum tensor whi… [Phys. Rev. D 94, 044017] Published Wed Aug 10, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 39
    Publication Date: 2016-08-11
    Description: Author(s): Andrei Galiautdinov and Sergei M. Kopeikin Applying the recently developed dynamical perturbation formalism on cosmological background to scalar-tensor theory, we provide a solid theoretical basis and a rigorous justification for phenomenological models of orbital dynamics that are currently used to interpret experimental measurements of the… [Phys. Rev. D 94, 044015] Published Wed Aug 10, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 40
    Publication Date: 2016-08-11
    Description: Author(s): B. Franzon, V. Dexheimer, and S. Schramm In this work, we study the effects of magnetic fields and rotation on the structure and composition of proto-neutron stars. A hadronic chiral SU(3) model is applied to cold neutron stars and proto-neutron stars with trapped neutrinos and at fixed entropy per baryon. We obtain general relativistic so… [Phys. Rev. D 94, 044018] Published Wed Aug 10, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 41
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    American Physical Society (APS)
    Publication Date: 2016-08-13
    Description: Author(s): S. I. Kruglov A model of nonlinear electrodynamics coupled with the gravitational field is studied. We obtain the asymptotic black hole solutions at r → 0 and r → ∞ . The asymptotic at r → 0 is shown, and we find corrections to the Reissner-Nordström solution and Coulomb’s law at r → ∞ . The mass of the black hole is evalu… [Phys. Rev. D 94, 044026] Published Fri Aug 12, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 42
    Publication Date: 2016-08-13
    Description: Author(s): B. J. Carr, Kazunori Kohri, Yuuiti Sendouda, and Jun’ichi Yokoyama The fraction of the Universe going into primordial black holes (PBHs) with initial mass M * ≈ 5 × 1 0 14     g , such that they are evaporating at the present epoch, is strongly constrained by observations of both the extragalactic and Galactic γ -ray backgrounds. However, while the dominant contribution to the… [Phys. Rev. D 94, 044029] Published Fri Aug 12, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 43
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-08-16
    Description: When a multibillion-dollar physics experiment is canceled, it's tempting to look for lessons that can be applied to future megascience projects. A new book on the rise and fall of the Superconducting Supercollider (SSC) by a trio of science historians takes on that challenge. And while the authors do an excellent job of describing what occurred in the decade from its inception to its demise, they stumble when trying to assign blame. Author: Jeffrey Mervis
    Keywords: Physics
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  • 44
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    American Physical Society (APS)
    Publication Date: 2016-08-24
    Description: Author(s): Saeede Nafooshe and Martin O’Loughlin We discuss the near-singularity region of the linear mass Vaidya metric. In particular, we investigate the structure in the numerical solutions for the scattering of scalar and electromagnetic metric perturbations from the singularity. We observe that, around the total evaporation point, quasinormal… [Phys. Rev. D 94, 044035] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 45
    Publication Date: 2016-08-24
    Description: Author(s): David Figueiredo, Felipe A. Gomes, Sébastien Fumeron, Bertrand Berche, and Fernando Moraes This paper deals with the propagation of Klein-Gordon particles in flat background spacetime exhibiting discontinuous metric changes from a Lorentzian signature ( − , + , + , + ) to a Kleinian signature ( − , + , + , − ) . A formal analogy with the propagation of electrons at a junction between an anisotropic semico… [Phys. Rev. D 94, 044039] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 46
    Publication Date: 2016-08-24
    Description: Author(s): P. J. Porfírio, J. B. Fonseca-Neto, J. R. Nascimento, A. Yu. Petrov, J. Ricardo, and A. F. Santos We verify the consistency of the Gödel-type solutions within the four-dimensional Chern-Simons modified gravity with the nondynamical Chern-Simons coefficient for different forms of matter including dust, fluid, scalar field, and electromagnetic field and discuss the related causality issues. We sho… [Phys. Rev. D 94, 044044] Published Mon Aug 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 47
    Publication Date: 2016-08-26
    Description: Author(s): Antonios Tsokaros, Bruno C. Mundim, Filippo Galeazzi, Luciano Rezzolla, and Kōji Uryū As numerical calculations of inspiraling neutron-star binaries reach values of accuracy that are comparable with those of black-hole binaries, a fine budgeting of the various sources of error becomes increasingly important. Among such sources, the initial data are normally not accounted for, the rat… [Phys. Rev. D 94, 044049] Published Thu Aug 25, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 48
    Publication Date: 2016-08-26
    Description: Author(s): C.-H. Chen, H. T. Cho, A. S. Cornell, and G. Harmsen In previous works we have studied spin- 3 / 2 fields near four-dimensional Schwarzschild black holes. The techniques we developed in that case have now been extended here to show that it is possible to determine the potential of spin- 3 / 2 fields near D -dimensional black holes by exploiting the radial sy… [Phys. Rev. D 94, 044052] Published Thu Aug 25, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 49
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    American Physical Society (APS)
    Publication Date: 2016-08-27
    Description: Author(s): S. Krasnikov The “trousers” spacetime is a pair of flat two-dimensional cylinders (“legs”) merging into a single one (“trunk”). In spite of its simplicity this spacetime has a few features (including, in particular, a naked singularity in the “crotch”) each of which is presumably unphysical, but for none of whic… [Phys. Rev. D 94, 044055] Published Fri Aug 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 50
    Publication Date: 2016-09-10
    Description: Author(s): Antonin Coutant and Silke Weinfurtner We study the propagation of low-frequency shallow water waves on a one-dimensional flow of varying depth. When taking into account dispersive effects, the linear propagation of long-wavelength modes on uneven bottoms excites new solutions of the dispersion relation which possess a much shorter wavel… [Phys. Rev. D 94, 064026] Published Fri Sep 09, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 51
    Publication Date: 2016-09-13
    Description: Author(s): Takahisa Igata, Tsuyoshi Houri, and Tomohiro Harada We study the self-similar motion of a string in a self-similar spacetime by introducing the concept of a self-similar string, which is defined as the world sheet to which a homothetic vector field is tangent. It is shown that in Nambu-Goto theory, the equations of motion for a self-similar string re… [Phys. Rev. D 94, 064029] Published Mon Sep 12, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 52
    Publication Date: 2016-09-13
    Description: Author(s): Anshul Saini and Dejan Stojkovic We study time-dependent Hawking-like radiation as seen by an infalling observer during gravitational collapse of a thin shell. We calculate the occupation number of particles of which the frequencies are measured in the proper time of an infalling observer in Eddington-Finkelstein coordinates. We so… [Phys. Rev. D 94, 064028] Published Mon Sep 12, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 53
    Publication Date: 2016-09-13
    Description: Author(s): Jonathan Engle, Ilya Vilensky, and Antonia Zipfel In previous work, the Lorentzian proper vertex amplitude for a spin-foam model of quantum gravity was derived. In the present work, the asymptotics of this amplitude are studied in the semiclassical limit. The starting point of the analysis is an expression for the amplitude as an action integral wi… [Phys. Rev. D 94, 064025] Published Fri Sep 09, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 54
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    American Physical Society (APS)
    Publication Date: 2016-09-14
    Description: Author(s): R. P. L. Azevedo and J. Páramos In this work, we use a dynamical system approach to analyze the viability of f ( R , L ) candidates for dark energy. We compare these with nonminimal coupled f ( R ) theories and study the solutions for exponential and power-law forms in order to constrain the allowed range of model parameters. [Phys. Rev. D 94, 064036] Published Tue Sep 13, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 55
    Publication Date: 2016-09-17
    Description: Author(s): Lydia Bieri, David Garfinkle, and Shing-Tung Yau We examine gravitational wave memory in the case where sources and detector are in an expanding cosmology. For simplicity, we treat the case where the cosmology is de Sitter spacetime, and discuss the possibility of generalizing our results to the case of a more realistic cosmology. We find results … [Phys. Rev. D 94, 064040] Published Thu Sep 15, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 56
    Publication Date: 2016-09-17
    Description: Author(s): Toshiaki Ono, Tomohito Suzuki, and Hideki Asada We study linear nonradial perturbations and stability of a marginal stable circular orbit such as the innermost stable circular orbit of a test particle in stationary axisymmetric spacetimes which possess a reflection symmetry with respect to the equatorial plane. A zenithal stability criterion is o… [Phys. Rev. D 94, 064042] Published Thu Sep 15, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 57
    Publication Date: 2016-09-22
    Description: Author(s): Michael Clark and Pablo Laguna A new approach to construct initial data for binary systems with neutron star components is introduced. The approach is a generalization of the puncture initial data method for binary black holes based on Bowen-York solutions to the momentum constraint. As with binary black holes, the method allows … [Phys. Rev. D 94, 064058] Published Wed Sep 21, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 58
    Publication Date: 2016-09-22
    Description: Author(s): Jaume de Haro, Jaume Amorós, and Supriya Pan The present work is a sequel of our previous work [ Phys. Rev. D 93 , 084018 (2016)] which depicted a simple version of an inflationary quintessential model whose inflationary stage was described by a Higgs-type potential and the quintessential phase was responsible due to an exponential potential. Ad… [Phys. Rev. D 94, 064060] Published Wed Sep 21, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 59
    Publication Date: 2016-09-01
    Description: Author(s): Jun-Qi Guo and Pankaj S. Joshi Spherical vacuum and scalar collapse for the Starobinsky R 2 model is simulated. Obtained by considering the quantum-gravitational effects, this model would admit some cases of singularity-free cosmological spacetimes. It is found, however, that in vacuum and scalar collapse, when f ′ or the physical … [Phys. Rev. D 94, 044063] Published Wed Aug 31, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 60
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    American Physical Society (APS)
    Publication Date: 2016-09-01
    Description: Author(s): Ippei Obata and Jiro Soda We study axionic inflation with a modulated potential and examine if the primordial tensor power spectrum exhibits oscillatory feature, which is testable with future space-based gravitational-wave experiments such as DECIGO and BBO. In the case of single-field axion monodromy inflation, it turns out… [Phys. Rev. D 94, 044062] Published Wed Aug 31, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 61
    Publication Date: 2016-09-13
    Description: Author(s): Jonathan Engle and Antonia Zipfel Spin foam models, an approach to defining the dynamics of loop quantum gravity, make use of the Plebanski formulation of gravity, in which gravity is recovered from a topological field theory via certain constraints called simplicity constraints. However, the simplicity constraints in their usual fo… [Phys. Rev. D 94, 064024] Published Fri Sep 09, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 62
    Publication Date: 2016-09-14
    Description: Author(s): Long Chen and Jian-Yang Zhu Anomaly-free perturbations of loop quantum cosmology with holonomy corrections reveal an Ω -deformed spacetime structure, Ω ≔ 1 − 2 ρ / ρ c , where Ω 〈 0 indicates a Euclidean-like space and Ω 〉 0 indicates a Lorentz-like space. It would be reasonable to give the initial value at the spacetime transition po… [Phys. Rev. D 94, 064037] Published Tue Sep 13, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 63
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    American Physical Society (APS)
    Publication Date: 2016-08-12
    Description: Author(s): Tuan Q. Do We study higher-dimensional scenarios of massive bigravity, which is a very interesting extension of nonlinear massive gravity since its reference metric is assumed to be fully dynamical. In particular, the Einstein field equations along with the following constraint equations for both physical and … [Phys. Rev. D 94, 044022] Published Thu Aug 11, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 64
    Publication Date: 2016-08-30
    Description: Author(s): Irina Arefeva, Andrey Bagrov, Petter Säterskog, and Koenraad Schalm Assuming that the AdS/CFT prescription is valid in the case of noncausal backgrounds, we apply it to the simplest possible eternal time machine solution in AdS 3 based on two conical defects moving around their center of mass along a circular orbit. Closed timelike curves in this space-time extend al… [Phys. Rev. D 94, 044059] Published Mon Aug 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 65
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-05-20
    Description: Standard superconductors consist of a condensate of paired electrons, called Cooper pairs. The transport behavior of these pairs at junctions can produce exotic effects that are of fundamental and practical interest. When two superconductors are in contact via a normal metal, the pairs must convert to single-particle states to traverse between superconductors. This occurs by the Andreev process, whereby a low-energy electron in the normal metal injects a Cooper pair into the superconductor and generates a hole that reflects back into the metal; coherent, opposite-momentum electron-hole pairs then carry the supercurrent across the metallic junction (1) (see the figure, panel A). In the case of superconductors connected to a quantum Hall state, there are only one-way paths along the junction edges. Here, a new type of Andreev process is predicted to occur, whereby electron and hole states on opposite sample edges carry the supercurrent. This prediction was made more than 20 years ago (2), but clear observation of the effect was frustrated by the difficulty of creating coexisting superconducting and quantum Hall states. On page 966 of this issue, Amet et al. (3) report on the interplay between these two states, finding evidence for the unconventional Andreev process. Their results confirm new physics that appears when two correlated states are connected, and opens the door to a range of novel excitations and exotic devices. Author: Nadya Mason
    Keywords: Physics
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  • 66
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-11
    Description: Grappling with our desire to understand nature, we construct models of the specific systems that we wish to study. Unsurprisingly, such models are generally highly tailored to the system of interest. But are all these models really that distinct? Or, could there be a universal model that can somehow describe the behavior of any system we could think of? On page 1180 of this issue, De las Cuevas and Cubitt (1) venture out to weave ideas from physics and computer science in an attempt to answer this question for all classical spin models. Author: Stephanie Wehner
    Keywords: Physics
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  • 67
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-18
    Description: The recent report of superconductivity in hydrogen sulfide (H2S) by Drozdov et al. (1) at a record high superconducting critical temperature Tc of 203 K and at high pressure (153 GPa) triggered excitement from both a fundamental and technological perspective. On page 1303 of this issue, Troyan et al. (2) confirm the finding by using an elegant and unexpected implementation of the Mössbauer technique at the third-generation synchrotron facility in Grenoble, France. They measured the Meissner effect (3)—the expulsion of magnetic field from the sample—thereby unequivocally confirming the existence of superconductivity. The new superconductor is believed to have a simple chemical formula, H3S. The superconductivity in H3S was predicted theoretically by Duan et al. (4) before the first experimental findings were reported. The technique has great potential for future studies of tiny samples squeezed to extremely high pressure. This experimental advance paves the road to probing superconductivity in metallic hydrogen, which is expected to be a room-temperature superconductor above 500 GPa (5). Author: Viktor Struzhkin
    Keywords: Physics
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  • 68
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-04
    Description: Turn a switch and the light goes on. The layman's perception is that this is like opening a tap so that the water starts running. But this analogy is misleading. The flow of water is governed by the theory of hydrodynamics, whereby the behavior of the fluid does not require knowledge of the motions of individual molecules. Electrical currents in solids, however, are formed from electrons. In metals, these do not collide with each other, but they do scatter from lattice imperfections. The resulting “Knudsen flow” of electrons is reminiscent of the avalanche of balls cascading through a dense forest of pins, as in a Pachinko machine. On pages 1058, 1055, and 1061 of this issue, evidence is presented that electrons can actually yield to the laws of hydrodynamics (1–3). What is additionally surprising is that these observations are in agreement with mathematical techniques borrowed from string theory (4). These techniques have been applied to describe strongly interacting forms of quantum matter, predicting that they should exhibit hydrodynamic flows (5). Author: Jan Zaanen
    Keywords: Physics
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  • 69
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-05-20
    Description: The 20th-century philosopher Wilfrid Sellars characterized the aim of philosophy as "to understand how things in the broadest possible sense of the term hang together in the broadest possible sense of the term." This is also physicist Sean Carroll's aim in his new book, The Big Picture. He sets out to show how various phenomena, including thought, choice, conscioussness, and value, hang together with the scientific account of reality that has been developed in physics in the past 100 years. He attempts to do all this without relying on specialized jargon from philosophy and physics, and succeeds spectacularly in achieving both aims. Author: Barry Loewer
    Keywords: Physics
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  • 70
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-04-22
    Description: An inherent aspect of any two-dimensional (2D) sheet is that all atoms in the material lie on the surface. This leads to a concept of 2D crystals as a “canvas,” where different chemical groups or “ink” on the surface can lead to a palette of distinct materials properties. The most well-studied 2D crystal is graphene, a one-atom-thick sheet of carbon atoms arranged in a honeycomb lattice. Although graphene's superlative materials properties and novel physical phenomena have led to a variety of applications (1), better tunability of these properties is still required. Toward this end, hydrogenated graphene (graphane) was predicted to have a wide band gap and exhibit magnetic order (2–4), in contrast to graphene, which is (semi)metallic and diamagnetic. The chemical stability of graphene makes hydrogenation difficult to control, and this has hampered efforts to tune its electronic or magnetic properties. On page 437 of this issue, González-Herrero et al. (5) report direct evidence that hydrogen atoms on graphene do indeed yield a magnetic moment and that these moments can order ferromagnetically over relatively large distances. If these methods can be extended to industrial scales, then one can imagine storing information at unprecedented densities by painting magnetic bits on graphene canvases (see the figure). Authors: S. M. Hollen, J. A. Gupta
    Keywords: Physics
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  • 71
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-04-15
    Description: Storing information in an ensemble of single-atom magnets represents the ultimate miniaturization of data storage technology, in which two specific orientations of each atomic magnetic moment represent a bit (a 0 or 1) of information (see the figure, panel A). The inherent dilemma in using a single-atom magnet is keeping it magnetized—or, in other words, being able to hold the information in one of the bit states without an external magnetic field for a useful amount of time and at practical temperatures (1, 2). This phenomenon of magnetic remanence is dif cult to realize from a single atom, in part because diminished robustness against fluctuations from the environment can unintentionally flip the magnetic state, thus wiping out the magnetic memory. A recent attempt to observe remanence in a single atom (3) proved premature, as the results were incompatible with the magnetic ground state of that system (4) and could not be reproduced (4, 5). Hence, the question of whether this defining property of a single-atom magnet can actually be achieved has remained an open question until now. On page 318 of this issue, Donati et al. (6) demonstrate that single holmium atoms exhibit magnetic remanence up to temperatures of 40 K, much higher than previous records of atomic-scale magnets composed of 3 to 12 atoms (1, 2, 5)—a record in both size and stability for any magnet. Authors: Alexander Ako Khajetoorians, Andreas J. Heinrich
    Keywords: Physics
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  • 72
    Publication Date: 2016-09-03
    Description: Author(s): Andy Bohn, Lawrence E. Kidder, and Saul A. Teukolsky With Advanced LIGO detecting the gravitational waves emitted from a pair of merging black holes in late 2015, we have a new perspective into the strong field regime of binary black hole systems. Event horizons are the defining features of such black hole spacetimes. We introduce a new code for locat… [Phys. Rev. D 94, 064008] Published Fri Sep 02, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 73
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    American Physical Society (APS)
    Publication Date: 2016-09-03
    Description: Author(s): Hari K. Kunduri and James Lucietti We present a new supersymmetric, asymptotically flat, black hole solution to five-dimensional U ( 1 ) 3 supergravity which is regular on and outside an event horizon of lens space topology L ( 2 , 1 ) . The solution has seven independent parameters and uplifts to a family of 1 / 8 -supersymmetric D1-D5-P black b… [Phys. Rev. D 94, 064007] Published Fri Sep 02, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 74
    Publication Date: 2016-09-03
    Description: Author(s): Andy Bohn, Lawrence E. Kidder, and Saul A. Teukolsky We find the first binary black hole event horizon with a toroidal topology. It has been predicted that generically the event horizons of merging black holes should briefly have a toroidal topology. However, such a phase has never been seen in numerical simulations. Instead, in all previous simulatio… [Phys. Rev. D 94, 064009] Published Fri Sep 02, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 75
    Publication Date: 2016-09-03
    Description: Author(s): J. Sadeghi, B. Pourhassan, and M. Rostami In this paper, we consider a dyonic charged anti-de Sitter black hole, which is a holographic dual of a van der Waals fluid. We use logarithm-corrected entropy and study thermodynamics of the black hole and show that holographic picture is still valid. Critical behaviors and stability are also discu… [Phys. Rev. D 94, 064006] Published Fri Sep 02, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 76
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    American Physical Society (APS)
    Publication Date: 2016-12-06
    Description: Author(s): Gabriel Farrugia and Jackson Levi Said We investigate the growth factor for subhorizon modes during late times in f ( T , T ) gravity, where T is the torsion scalar and T is the trace of the stress-energy tensor. This is achieved by obtaining the modified Mészáros equation, which describes the evolution of the perturbations of the matter ener… [Phys. Rev. D 94, 124004] Published Fri Dec 02, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 77
    Publication Date: 2016-12-06
    Description: Author(s): Sven Zschocke An analytical solution for the light trajectory in the near zone of the gravitational field of one pointlike body in arbitrary slow motion in the post-post-Newtonian approximation is presented in harmonic gauge. Expressions for total light deflection and time delay are given. The presented solution … [Phys. Rev. D 94, 124007] Published Mon Dec 05, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 78
    Publication Date: 2016-12-06
    Description: Author(s): Fotios V. Dimitrakopoulos, Ben Freivogel, Juan F. Pedraza, and I-Sheng Yang Previous work on the anti–de Sitter (AdS) instability problem within the two-time framework (TTF) has found an “oscillating singularity” whose presence depends on the gauge choice. We give a physical interpretation of this singularity as a diverging redshift between the boundary and the center of Ad… [Phys. Rev. D 94, 124008] Published Mon Dec 05, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 79
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    American Physical Society (APS)
    Publication Date: 2016-12-06
    Description: Author(s): Donato Bini and Bahram Mashhoon In general relativity, relativistic gravity gradiometry involves the measurement of the relativistic tidal matrix, which is theoretically obtained from the projection of the Riemann curvature tensor onto the orthonormal tetrad frame of an observer. The observer’s 4-velocity vector defines its local … [Phys. Rev. D 94, 124009] Published Mon Dec 05, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 80
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    American Physical Society (APS)
    Publication Date: 2016-11-17
    Description: Author(s): Josef Klusoň This short paper is devoted to the canonical analysis of the Hořava-Lifshitz gravity with mixed derivative terms that was proposed in Phys. Rev. D 94 , 084014 (2016). We determine the algebra of constraints and we show that there is one additional scalar degree of freedom with respect to the nonproje… [Phys. Rev. D 94, 104043] Published Wed Nov 16, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 81
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    American Physical Society (APS)
    Publication Date: 2016-11-19
    Description: Author(s): Edgar Shaghoulian We extend a recently derived higher-dimensional Cardy formula to include angular momenta, which we use to obtain the Bekensten-Hawking entropy of anti-de Sitter black branes, compactified rotating branes, and large Schwarzschild/Kerr black holes. This is the natural generalization of Strominger’s mi… [Phys. Rev. D 94, 104044] Published Fri Nov 18, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 82
    Publication Date: 2016-11-22
    Description: Author(s): James Dilts and James Isenberg For each set of (freely chosen) seed data, the conformal method reduces the Einstein constraint equations to a system of elliptic equations, the conformal constraint equations. We prove an admissibility criterion, based on a (conformal) prescribed scalar curvature problem, which provides a necessary… [Phys. Rev. D 94, 104046] Published Mon Nov 21, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 83
    Publication Date: 2016-11-23
    Description: Author(s): S. Nojiri, S. D. Odintsov, and V. K. Oikonomou In this paper, we demonstrate that a unified description of early and late-time acceleration is possible in the context of mimetic F ( R ) gravity. We study the inflationary era in detail and demonstrate that it can be realized even in mimetic F ( R ) gravity where traditional F ( R ) gravity fails to descri… [Phys. Rev. D 94, 104050] Published Tue Nov 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 84
    Publication Date: 2016-11-23
    Description: Author(s): William Donnelly and Aron C. Wall We calculate the vacuum entanglement entropy of Maxwell theory in a class of curved spacetimes by Kaluza-Klein reduction of the theory onto a two-dimensional base manifold. Using two-dimensional duality, we express the geometric entropy of the electromagnetic field as the entropy of a tower of scala… [Phys. Rev. D 94, 104053] Published Tue Nov 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 85
    Publication Date: 2016-11-23
    Description: Author(s): Luis J. Garay, Eduardo Martín-Martínez, and José de Ramón We study the anti-Unruh effect in general stationary scenarios. We find that, for accelerated trajectories, a particle detector coupled to a Kubo-Martin-Schwinger (KMS) state of a quantum field can cool down (click less often) as the KMS temperature increases. Remarkably, this is so even when the de… [Phys. Rev. D 94, 104048] Published Tue Nov 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 86
    Publication Date: 2016-11-23
    Description: Author(s): Melina Bordcoch, Carlos N. Kozameh, and Teresita A. Rojas The dynamical equations for the null surface formulation of general relativity for purely radiative spacetimes are derived. Those asymptotically flat spacetimes describe the nonlinear evolution of gravitational radiation and represent a classical graviton. The evolution equations constitute a set of… [Phys. Rev. D 94, 104051] Published Tue Nov 22, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 87
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    American Physical Society (APS)
    Publication Date: 2016-11-24
    Description: Author(s): Rio Saitou We investigate the invariant canonical transformation of a spatially covariant scalar-tensor theory of gravity, called the XG theory. Under the invariant canonical transformation, the forms of the action or the Hamiltonian and the primary constraints are preserved, but the action or the Hamiltonian … [Phys. Rev. D 94, 104054] Published Wed Nov 23, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 88
    Publication Date: 2016-11-29
    Description: Author(s): Cesar Merlin, Amos Ori, Leor Barack, Adam Pound, and Maarten van de Meent Vacuum perturbations of the Kerr metric can be reconstructed from the corresponding perturbation in either of the two Weyl scalars ψ 0 or ψ 4 , using a procedure described by Chrzanowski and others in the 1970s. More recent work, motivated within the context of self-force physics, extends the procedure… [Phys. Rev. D 94, 104066] Published Mon Nov 28, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 89
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    American Physical Society (APS)
    Publication Date: 2016-11-29
    Description: Author(s): Philippe Brax and Anne-Christine Davis Atomic interferometry can be used to probe dark energy models coupled to matter. We consider the constraints coming from recent experimental results on models generalizing the inverse power law chameleons such as f ( R ) gravity in the large curvature regime, the environmentally dependent dilaton and s… [Phys. Rev. D 94, 104069] Published Mon Nov 28, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 90
    Publication Date: 2016-11-29
    Description: Author(s): Sunly Khimphun, Bum-Hoon Lee, and Wonwoo Lee We study the thermodynamic properties of a black hole and the Hawking-Page phase transition in the asymptotically anti–de Sitter spacetime in the dilatonic Einstein-Gauss-Bonnet theory of gravitation. We show how the higher-order curvature terms can influence both the thermodynamic properties and th… [Phys. Rev. D 94, 104067] Published Mon Nov 28, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 91
    Publication Date: 2016-11-30
    Description: Author(s): Archisman Ghosh, Walter Del Pozzo, and Parameswaran Ajith We characterize the expected statistical errors with which the parameters of black hole binaries can be measured from gravitational-wave (GW) observations of their inspiral, merger, and ringdown by a network of second-generation ground-based GW observatories. We simulate a population of black hole b… [Phys. Rev. D 94, 104070] Published Tue Nov 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 92
    Publication Date: 2016-11-30
    Description: Author(s): Song Ming Du and Atsushi Nishizawa It is well known that two types of gravitational wave memory exist in general relativity (GR): the linear memory and the nonlinear, or Christodoulou, memory. These effects, especially the latter, depend on the specific form of the Einstein equation. It can then be speculated that, in modified theori… [Phys. Rev. D 94, 104063] Published Tue Nov 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 93
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    American Physical Society (APS)
    Publication Date: 2016-09-24
    Description: Author(s): Jun Tao, Peng Wang, and Haitang Yang Doubly special relativity (DSR) is an effective model for encoding quantum gravity in flat spacetime. To incorporate DSR into general relativity, one could use “gravity’s rainbow,” where the spacetime background felt by a test particle would depend on its energy. In this scenario, one could rewrite … [Phys. Rev. D 94, 064068] Published Fri Sep 23, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 94
    Publication Date: 2016-09-24
    Description: Author(s): Tekin Dereli and Cem Yetişmişoğlu We derive the field equations for topologically massive gravity coupled with the most general quadratic curvature terms using the language of exterior differential forms and a first order constrained variational principle. We find variational field equations both in the presence and absence of torsi… [Phys. Rev. D 94, 064067] Published Fri Sep 23, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 95
    Publication Date: 2016-09-27
    Description: Author(s): L. Herrera, A. Di Prisco, J. Ospino, and J. Carot We report a study on axially and reflection symmetric dissipative fluids, just after its departure from hydrostatic and thermal equilibrium, at the smallest time scale at which the first signs of dynamic evolution appear. Such a time scale is smaller than the thermal relaxation time, the thermal adj… [Phys. Rev. D 94, 064072] Published Mon Sep 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 96
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    American Physical Society (APS)
    Publication Date: 2016-09-27
    Description: Author(s): Takayuki Ohgami and Nobuyuki Sakai As an extension of our previous work, which investigated the shadows of the Ellis wormhole surrounded by nonrotating dust, in this paper we study wormhole shadows in a rotating dust flow. First, we derive steady-state solutions of slowly rotating dust surrounding the wormhole by solving relativistic… [Phys. Rev. D 94, 064071] Published Mon Sep 26, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 97
    Publication Date: 2016-09-29
    Description: Author(s): M. L. Pucheu, C. Romero, M. Bellini, and José Edgar Madriz Aguilar We investigate gauge invariant scalar fluctuations of the metric during inflation in a nonperturbative formalism in the framework of a recently formulated scalar-tensor theory of gravity, in which the geometry of space-time is that of a Weyl integrable manifold. We show that in this scenario the Wey… [Phys. Rev. D 94, 064075] Published Wed Sep 28, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 98
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    American Physical Society (APS)
    Publication Date: 2016-09-30
    Description: Author(s): M. Gracia-Linares and F. S. Guzmán We present the evolution of a supersonic wind interacting with a boson star (BS) and compare the resulting wind density profile with that of the shock cone formed when the wind is accreted by a nonrotating black hole (BH) of the same mass. The physical differences between these accretors are that a … [Phys. Rev. D 94, 064077] Published Thu Sep 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 99
    Publication Date: 2016-09-30
    Description: Author(s): M. Libanov and V. Rubakov Motivated by holographic models of a (pseudo)conformal Universe, we carry out a complete analysis of linearized metric perturbations in the time-dependent two-brane setup of the Lykken-Randall type. We present the equations of motion for the scalar, vector and tensor perturbations and identify light… [Phys. Rev. D 94, 064076] Published Thu Sep 29, 2016
    Keywords: General relativity, alternative theories of gravity
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  • 100
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-09-30
    Description: Next week, the 2016 Nobel Prize in Physics will be announced, and many scientists expect it to honor the detection of ripples in space called gravitational waves, reported in February by scientists working with the Laser Interferometer Gravitational-Wave Observatory (LIGO). If other prizes are a guide, the Nobel will go to the troika of physicists who 32 years ago conceived of LIGO: Rainer Weiss of the Massachusetts Institute of Technology in Cambridge, and Ronald Drever and Kip Thorne of the California Institute of Technology (Caltech) in Pasadena. But some influential physicists, including previous Nobel laureates, say the prize, which can be split three ways at most, should include somebody else: Barry Barish, a particle physicist at Caltech. Barish didn't invent LIGO, but he made it happen. The hardware at LIGO's two observatories in Hanford, Washington, and Livingston, Louisiana; the structure of the collaboration; even the big-science character of gravitational wave research—all were molded by Barish, who is now 80. Without Barish, some physicists say, there would have been no discovery. Author: Adrian Cho
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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