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  • 1
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    Non-equilibrium scale invariance and shortcuts to adiabaticity in a one-dimensional Bose gas (2015)
    Springer Nature
    Details
    Publication Date: 2015-04-14
    Description: We present experimental evidence for scale invariant behaviour of the excitation spectrum in phase-fluctuating quasi-1d Bose gases after a rapid change of the external trapping potential. Probing density correlations in free expansion, we find that the temperature of an initial thermal state scales with the spatial extension of the cloud as predicted by a model based on adiabatic rescaling of initial eigenmodes with conserved quasiparticle occupation numbers. Based on this result, we demonstrate that shortcuts to adiabaticity for the rapid expansion or compression of the gas do not induce additional heating. Scientific Reports 5 doi: 10.1038/srep09820
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 2
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    Cooling of a One-Dimensional Bose Gas (2016)
    American Physical Society (APS)
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    Publication Date: 2016-01-23
    Description: Author(s): B. Rauer, P. Grišins, I. E. Mazets, T. Schweigler, W. Rohringer, R. Geiger, T. Langen, and J. Schmiedmayer We experimentally study the dynamics of a degenerate one-dimensional Bose gas that is subject to a continuous outcoupling of atoms. Although standard evaporative cooling is rendered ineffective by the absence of thermalizing collisions in this system, we observe substantial cooling. This cooling pro… [Phys. Rev. Lett. 116, 030402] Published Fri Jan 22, 2016
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Dephasing in coherently split quasicondensates (2011)
    American Physical Society (APS)
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    Publication Date: 2011-02-26
    Description: Author(s): H.-P. Stimming, N. J. Mauser, J. Schmiedmayer, and I. E. Mazets We numerically model the evolution of a pair of coherently split quasicondensates. A truly one-dimensional case is assumed, so that the loss of the (initially high) coherence between the two quasicondensates is due to dephasing only, but not due to the violation of integrability and subsequent therm... [Phys. Rev. A 83, 023618] Published Fri Feb 25, 2011
    Keywords: Matter waves and collective properties of cold atoms and molecules
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Two-Point Phase Correlations of a One-Dimensional Bosonic Josephson Junction (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-01-15
    Description: Author(s): T. Betz, S. Manz, R. Bücker, T. Berrada, Ch. Koller, G. Kazakov, I. E. Mazets, H.-P. Stimming, A. Perrin, T. Schumm, and J. Schmiedmayer We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct access to the relative phase field, which reflects the interplay of thermally driven fluctuations and phase locking due to t... [Phys. Rev. Lett. 106, 020407] Published Fri Jan 14, 2011
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Dynamics and kinetics of quasiparticle decay in a nearly-one-dimensional degenerate Bose gas (2011)
    American Physical Society (APS)
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    Publication Date: 2011-04-30
    Description: Author(s): I. E. Mazets We consider decay of a quasiparticle in a nearly-one-dimensional quasicondensate of trapped atoms, where virtual excitations of transverse modes break down one-dimensionality and integrability, giving rise to effective three-body elastic collisions. We calculate the matrix element for the process th... [Phys. Rev. A 83, 043625] Published Fri Apr 29, 2011
    Keywords: Matter waves and collective properties of cold atoms and molecules
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Many-body physics of slow light (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-30
    Description: Author(s): I. E. Mazets We present a quantum theory of slow light beyond the weak probe pulse approximation. By reduction of the full Hamiltonian of the system to an effective Hamiltonian for a single quantum field we demonstrate that the concept of dark-state polaritons can be introduced even if the linearized approach is... [Phys. Rev. A 90, 063837] Published Mon Dec 29, 2014
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Experimental observation of a generalized Gibbs ensemble (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-04-11
    Description: The description of the non-equilibrium dynamics of isolated quantum many-body systems within the framework of statistical mechanics is a fundamental open question. Conventional thermodynamical ensembles fail to describe the large class of systems that exhibit nontrivial conserved quantities, and generalized ensembles have been predicted to maximize entropy in these systems. We show experimentally that a degenerate one-dimensional Bose gas relaxes to a state that can be described by such a generalized ensemble. This is verified through a detailed study of correlation functions up to 10th order. The applicability of the generalized ensemble description for isolated quantum many-body systems points to a natural emergence of classical statistical properties from the microscopic unitary quantum evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Langen, Tim -- Erne, Sebastian -- Geiger, Remi -- Rauer, Bernhard -- Schweigler, Thomas -- Kuhnert, Maximilian -- Rohringer, Wolfgang -- Mazets, Igor E -- Gasenzer, Thomas -- Schmiedmayer, Jorg -- New York, N.Y. -- Science. 2015 Apr 10;348(6231):207-11. doi: 10.1126/science.1257026.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria. ; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria. Institut fur Theoretische Physik, Ruprecht-Karls-Universitat Heidelberg, 69120 Heidelberg, Germany. ExtreMe Matter Institute (EMMI), GSI Helmholtzzentrum fur Schwerionenforschung GmbH, 64291 Darmstadt, Germany. ; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria. Wolfgang Pauli Institute, 1090 Vienna, Austria. Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia. ; Institut fur Theoretische Physik, Ruprecht-Karls-Universitat Heidelberg, 69120 Heidelberg, Germany. ExtreMe Matter Institute (EMMI), GSI Helmholtzzentrum fur Schwerionenforschung GmbH, 64291 Darmstadt, Germany. ; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria. schmiedmayer@atomchip.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25859041" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
    Electronic Resource
    Electronic Resource
    Characteristics of four-wave mixing in a Bose-condensed atomic gas (1999)
    Springer
    Technical physics letters 25 (1999), S. 911-912 
    Details
    ISSN: 1090-6533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An analysis is made of four-wave mixing of laser radiation interacting with an ultracold degenerate ensemble of boson atoms trapped in a magnetic trap. It is shown that the existence of long-range order in this type of atomic system leads to a new mechanism for the generation of the reversed wave whose experimental manifestation should differ from four-wave mixing in a nondegenerate gas. A similar nonlinear optical effect may be used for diagnostics of an ultracold gas at temperatures not much lower than the phase transition temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1262681
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  • 9
    Electronic Resource
    Electronic Resource
    Instability of a Bose condensate of neutral atoms in an external light field of nonuniform intensity (1999)
    Springer
    Technical physics letters 25 (1999), S. 372-373 
    Details
    ISSN: 1090-6533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The existence of a new of type of instability of a Bose condensate in a rarefied atomic gas due to momentum exchange with an external resonant spatially nonuniform radiation field is demonstrated theoretically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1262486
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  • 10
    Electronic Resource
    Electronic Resource
    Interaction of an optically dense bose condensate with a resonant laser pulse (2000)
    Springer
    Technical physics letters 26 (2000), S. 247-249 
    Details
    ISSN: 1090-6533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Propagation of a resonant laser pulse through an optically dense Bose-Einstein condensate is theoretically investigated. Changes in the spatial distribution of the condensate after the laser pulse propagation are analyzed. It is shown that atoms escape from the condensate due to the joint action of two factors: the transition of atoms from the ground state to an excited state upon absorption of the resonant photons and the effect of a zero-result measurement. The latter effect is interpreted in terms of the theory of quantum measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1262807
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