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  • American Physical Society (APS)  (74,347)
  • 2020-2024  (2)
  • 2010-2014  (74,345)
  • 1945-1949
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  • 1
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    Critical Drift in a Neuro-Inspired Adaptive Network (2023)
    American Physical Society (APS)
    In:  EPIC3Physical Review Letters, American Physical Society (APS), 130(18), pp. 188401-188401, ISSN: 0031-9007
    Details
    Publication Date: 2023-12-05
    Description: It has been postulated that the brain operates in a self-organized critical state that brings multiple benefits, such as optimal sensitivity to input. Thus far, self-organized criticality has typically been depicted as a one-dimensional process, where one parameter is tuned to a critical value. However, the number of adjustable parameters in the brain is vast, and hence critical states can be expected to occupy a high-dimensional manifold inside a high-dimensional parameter space. Here, we show that adaptation rules inspired by homeostatic plasticity drive a neuro-inspired network to drift on a critical manifold, where the system is poised between inactivity and persistent activity. During the drift, global network parameters continue to change while the system remains at criticality.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
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    Master stability functions for metacommunities with two types of habitats (2022)
    American Physical Society (APS)
    In:  EPIC3Physical Review E, American Physical Society (APS), 105(4), pp. 044310-044310, ISSN: 2470-0045
    Details
    Publication Date: 2023-12-05
    Description: Current questions in ecology revolve around instabilities in the dynamics on spatial networks and particularly the effect of node heterogeneity. We extend the master stability function formalism to inhomogeneous biregular networks having two types of spatial nodes. Notably, this class of systems also allows the investigation of certain types of dynamics on higher-order networks. Combined with the generalized modeling approach to study the linear stability of steady states, this is a powerful tool to numerically asses the stability of large ensembles of systems. We analyze the stability of ecological metacommunities with two distinct types of habitats analytically and numerically in order to identify several sets of conditions under which the dynamics can become stabilized by dispersal. Our analytical approach allows general insights into stabilizing and destabilizing effects in metapopulations. Specifically, we identify self-regulation and negative feedback loops between source and sink populations as stabilizing mechanisms and we show that maladaptive dispersal may be stable under certain conditions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 3
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    Atomistic simulations of tension-induced large deformation and stretchability in graphene kirigami (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Zenan Qi, David K. Campbell, and Harold S. Park Graphene's exceptional mechanical properties, including its highest-known stiffness (1 TPa) and strength (100 GPa), have been exploited for various structural applications. However, graphene is also known to be quite brittle, with experimentally measured tensile fracture strains that do not exceed a... [Phys. Rev. B 90, 245437] Published Tue Dec 30, 2014
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Left-right supersymmetry after the Higgs boson discovery (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Mariana Frank, Dilip Kumar Ghosh, Katri Huitu, Santosh Kumar Rai, Ipsita Saha, and Harri Waltari We perform a thorough analysis of the parameter space of the minimal left-right supersymmetric model in agreement with the LHC data. The model contains left- and right-handed fermionic doublets, two Higgs bidoublets, two Higgs triplet representations, and one singlet, insuring a charge-conserving va... [Phys. Rev. D 90, 115021] Published Tue Dec 30, 2014
    Keywords: Beyond the Standard Model
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
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  • 5
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    B-L heavy neutrinos and neutral gauge boson Z^{′} at the LHC (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): A. A. Abdelalim, A. Hammad, and S. Khalil We explore possible signatures for heavy neutrinos and a neutral gauge boson, Z ′ , in the TeV scale B-L extension of the Standard Model with inverse seesaw mechanisms at the Large Hadron Collider. We show that, due to new decay channels of Z ′ into heavy/inert neutrinos, the LHC stringent bounds impos... [Phys. Rev. D 90, 115015] Published Tue Dec 30, 2014
    Keywords: Beyond the Standard Model
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
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  • 6
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    Neutron angular correlations in spontaneous and neutron-induced fission (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): R. Vogt and J. Randrup Nuclear fission generates neutrons whose correlations may reveal at which stage they appear during the fission process, whether from the fully formed fission fragments or from the scission process itself. The authors study the sensitivity of the neutron-neutron angular correlations to the parameters of their fission model, and they find that the available experimental data can be predicted without the need for any scission neutrons. [Phys. Rev. C 90, 064623] Published Tue Dec 30, 2014
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
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  • 7
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    Emergence of soft quark excitations by the coupling with a soft mode of the QCD critical point (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Masakiyo Kitazawa, Teiji Kunihiro, and Yukio Nemoto We study the quark spectrum at nonzero temperature and density near the critical point (CP) of the chiral phase transition incorporating effects of the scalar- and pseudoscalar-density fluctuations in a chiral effective model with a nonzero current quark mass. It is known that the soft mode associat... [Phys. Rev. D 90, 116008] Published Tue Dec 30, 2014
    Keywords: Field Theory, General Methods
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
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  • 8
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    Leptonic CP violating phase in the Yukawaon model (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Yoshio Koide and Hiroyuki Nishiura In the so-called “Yukawaon” model, the (effective) Yukawa coupling constants Y f eff are given by vacuum expectation values (VEVs) of scalars Y f (Yukawaons) with 3×3 components. In this brief article, we change VEV forms ⟨Y f ⟩ in the previous paper into a unified form. Therefore, parameter fitting for ... [Phys. Rev. D 90, 117903] Published Tue Dec 30, 2014
    Keywords: Field theory, general methods
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
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  • 9
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    Lightness of Higgs boson and spontaneous CP violation in the Lee model (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Ying-nan Mao and Shou-hua Zhu We proposed a mechanism in which the lightness of Higgs boson and the smallness of charge parity (CP) violation are correlated based on the Lee model, namely, the spontaneous CP-violation two-Higgs-doublet model. In this model, the mass of the lightest Higgs boson m h as well as the quantities K and ... [Phys. Rev. D 90, 115024] Published Tue Dec 30, 2014
    Keywords: Beyond the Standard Model
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
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  • 10
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    Baryon asymmetries in a natural inflation model (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-31
    Description: Author(s): Nan Li and Ding-fang Zeng A variation of the Affleck-Dine mechanism was proposed to generate the observed baryon asymmetry by Hertzberg and Karouby [Phys. Rev. D 89 , 006523 (2014); Phys. Lett. B 737 , 34 (2014)], in which the inflaton was assumed to be a complex scalar field with a weakly broken U(1) symmetry, and the baryon ... [Phys. Rev. D 90, 123542] Published Tue Dec 30, 2014
    Keywords: Cosmology
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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