Article
Physics, Nuclear
Yuchen Huang, Hongmei Jing, Jun Tao, Feiyu Yao
Summary: The study examines the phase structures and transitions of RN black holes under two different boundary conditions, namely AdS space and a Dirichlet wall. Different regions and phase transition behaviors are observed in the parameter space for each boundary condition, highlighting distinct characteristics between the two cases.
Article
Astronomy & Astrophysics
Carla Henriquez-Baez, Marcela Lagos, Aldo Vera
Summary: In this study, analytical solutions describing black holes and black strings in the Einstein SU(N)-nonlinear sigma model were constructed using the embedding ansatz and parametrization methods. These configurations not only satisfy the model equations but also demonstrate the impact of the flavor number on the geometry and thermodynamics.
Article
Physics, Applied
Ji-Xuan Hou
Summary: By utilizing a straightforward argument, this study clarifies that the thermodynamic non-equivalence between the canonical and microcanonical ensembles arises from the first-order canonical phase transition at the thermodynamic limit. Ensemble equivalence can only be achieved when the energy fluctuation is negligible compared to the average energy. However, the non-vanishing energy fluctuation during the first-order transition, even in the thermodynamic limit, leads to the breakdown of ensemble equivalence. Similar findings can also be applied to other dual ensembles.
MODERN PHYSICS LETTERS B
(2022)
Article
Physics, Multidisciplinary
Sheng Zhang, Ji-Xuan Hou
Summary: The mean-field Blume-Emery-Griffiths model is studied in both the microcanonical and canonical ensembles. In the microcanonical ensemble, a zeroth-order phase transition occurs when J <= 0 and 0.5 <= Delta <= 0.12, resulting in an entropy jump at the phase transition point. Conversely, there are no zeroth-order phase transitions when... > 0. Four different microcanonical (Delta, T) phase diagrams and their respective parameter ranges are shown. Six different canonical (Delta, T) phase diagrams and their corresponding parameter boundaries are also presented. Additionally, it is demonstrated that (Delta, T) phase diagrams are identical for any J <= 0 in either the microcanonical or canonical ensemble.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Multidisciplinary Sciences
Kouji Kashiwa
Summary: This paper discusses the thermal phase structure of QCD at zero real chemical potential from the perspective of canonical sectors. It proposes a convenient quantity to determine the structural changes of the canonical sectors and qualitatively discusses it using lattice QCD predictions. Numerical estimations are also conducted using a simple QCD effective model to show a sharp change in canonical sectors near the Roberge-Weiss endpoint temperature at mu(R)=0, highlighting the importance of quark number density behavior in clarifying thermal QCD properties.
Article
Astronomy & Astrophysics
Ali Dehghani, Seyed Hossein Hendi
Summary: In the discussion of holographic phase transitions of charged topological black holes in the context of black hole chemistry, different behaviors are observed in various dimensions, including van der Waals behavior, typical reentrant phase transition, as well as anomalous vdW and triple point phenomena.
Article
Physics, Multidisciplinary
Yu-Chen Yao, Ji-Xuan Hou
Summary: The paper investigates the microcanonical-canonical crossover behavior of the NK model by placing it in contact with a two-level reservoir, and presents the transition of the tricritical point.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2021)
Article
Chemistry, Physical
Xi Chen, Muammar El Khatib, Per Lindgren, Adam Willard, Andrew J. Medford, Andrew A. Peterson
Summary: This article presents a strategy for machine-learning emulation of electronic structure calculations in the electronically grand-canonical ensemble. The approach uses a dual-learning scheme to predict both system charge and system energy for each image. The scheme has been shown to successfully emulate basic electrochemical reactions at various potentials and combining it with a bootstrap-ensemble approach gives reasonable estimates of prediction uncertainty. The method also accelerates saddle-point searches and extrapolates to systems with different numbers of water layers. This method is expected to enable larger length- and time-scale simulations necessary for electrochemical simulations.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Physics, Particles & Fields
Askar Ali, Khalid Saifullah
Summary: In this study, higher dimensional hairy black holes in quartic quasi-topological gravity are analyzed using non-abelian power-Yang-Mills theory. The existence of real solutions is shown to depend on the quartic quasi-topological coefficient being positive. Depending on various parameters, the solutions can represent black holes with different numbers of horizons and a naked singularity. Thermodynamic properties and conservation quantities are calculated, and the stability of the solutions is examined in different ensembles. New power-Yang-Mills hairy black hole solutions in pure quasi-topological gravity are also formulated and discussed. The thermodynamics of horizon flat power-Yang-Mills rotating black branes are analyzed as well.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Mathematics, Applied
Alfredo M. Ozorio de Almeida, Gert-Ludwig Ingold, Olivier Brodier
Summary: The density operator for a quantum system in thermal equilibrium with its environment depends on Planck's constant and temperature. Different temperature regimes lead to distinct quantum properties of the system, and integrals are used to compute thermal averages effectively.
PHYSICA D-NONLINEAR PHENOMENA
(2021)
Article
Physics, Multidisciplinary
Jianjia Wang, Xichen Wu, Mingrui Li
Summary: This study advances the analysis of fMRI data by using methods of network neuroscience to detect the onset and progression of Alzheimer's disease, introducing novel techniques for network construction and analysis. By applying ensemble methods to model statistical ensembles in thermal systems, the study successfully identifies brain regions undergoing pathological changes and reveals the dynamics of such changes with clinical sensitivity.
Article
Biochemistry & Molecular Biology
Raquel Carreira, F. Javier Aguado, Vanesa Hurtado-Nieves, Miguel G. Blanco
Summary: Yen1 and GEN1 are members of the Rad2/XPG family of nucleases that act as canonical nuclear Holliday junction resolvases by introducing coordinated incisions on opposite strands of the HJ. While Yen1 shares similarities with GEN1, it also exhibits additional nuclease activities that could blur its classification as a canonical HJ resolvase. However, Yen1 still fulfills the requirements of a canonical HJ resolvase and may play a role in the removal of persistent recombination or replication intermediates.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Physics, Fluids & Plasmas
Philipp Stroeker, Karsten Meier
Summary: The methodology developed by Lustig is applied to derive rigorous expressions for thermodynamic properties of fluids in the grand canonical ensemble, which are expressed by phase-space functions related to derivatives of the grand canonical potential. The derived expressions are validated by Monte Carlo simulations, providing more reliable results compared to previous literature and becoming equivalent to corresponding expressions in the canonical ensemble in the thermodynamic limit.
Article
Astronomy & Astrophysics
Netta Engelhardt, Asmund Folkestad
Summary: We demonstrate that the purification of an evaporating black hole after the Page time involves a connected Lorentzian wormhole between two asymptotic boundaries, with one being unitarily related to the radiation. This realization aligns with the predictions of ER = EPR and allows for a standard calculation of radiation entropy within AdS/CFT without modifying the homology constraint. Prior to the Page time, the purification consists of two disconnected semiclassical black holes. By constructing bipartite entangled holographic CFT states from this, we speculate that measures of multipartite entanglement could provide a more comprehensive understanding of spacetime emergence.
Review
Physics, Multidisciplinary
Angel R. Plastino, Angelo Plastino
Summary: Non-standard thermostatistical formalisms derived from generalizations of the Boltzmann-Gibbs entropy, particularly the S-q non-additive entropies, have attracted significant attention and achieved successful applications in various fields. The S-q-based thermostatistics exhibits peculiar features and a close connection between S-q-canonical distributions and micro-canonical ensemble, which has been extensively explored by researchers. In this study, we provide a brief review on micro-canonical scenarios leading to S-q-canonical distributions, including historical works where the S-q-canonical distributions were unidentified and recent works explicitly investigating the Sq-micro-canonical connection.
Article
Physics, Particles & Fields
M. J. Duff, J. X. Lu, R. Percacci, C. N. Pope, H. Samtleben, E. Sezgin
Article
Physics, Particles & Fields
Qiang Jia, J. X. Lu, Xiao-Jun Tan
Article
Physics, Particles & Fields
Huiquan Li, J. X. Lu
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Physics, Particles & Fields
J. X. Lu
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
J. X. Lu
Article
Astronomy & Astrophysics
J. X. Lu, Jun Ouyang, Shibaji Roy
Article
Physics, Particles & Fields
J. X. Lu, Ran Wei
JOURNAL OF HIGH ENERGY PHYSICS
(2013)
Article
Astronomy & Astrophysics
J. X. Lu
Article
Astronomy & Astrophysics
Qiang Jia, J. X. Lu
Article
Physics, Particles & Fields
J. X. Lu
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Qiang Jia, J. X. Lu, Zihao Wu, Xiaoying Zhu
Article
Physics, Multidisciplinary
Yi-Fei Chen, J. X. Lu, Nan Zhang
Summary: In this study, we present a detailed examination of the process of dynamically generating an M2 brane in a pp-wave background with maximal spacetime SUSY. We find that there are three kinds of dynamical solutions depending on the excess energy, and once the excess energy surpasses a critical value, there exists a single solution with independent dynamical behavior.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yi-Fei Chen, Jian-Xin Lu
Summary: We studied the dynamical Myers effect by allowing the fuzzy or dynamical dielectric brane coordinates to vary with time, finding three novel types of dynamical spherical dielectric branes with different excess energies. Each type exhibits unique characteristics in terms of oscillation patterns and time dependence, offering insights into the creation and annihilation processes of dielectric branes in various scenarios.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Physics, Particles & Fields
J. X. Lu, Nan Zhang
Summary: In this paper, we report the discovery of two new systems that can produce a significantly larger rate of open string pair production under more relaxed conditions. By considering D3 as our (1 + 3) dimensional world and placing the non-threshold bound state (F, D1) or (D3, (F, D1)) parallel in the transverse directions, this achievement is made possible.
Review
Physics, Multidisciplinary
Lu Jian-Xin, Zhang Nan
ACTA PHYSICA SINICA
(2020)
Article
Physics, Particles & Fields
Bogdan Damski
Summary: In this paper, we discuss the dynamics of field configurations in the Proca theory of the real massive vector field, specifically focusing on a certain class of electric (magnetic) dipole-charged states. We construct these states to ensure that the long-distance structure of the mean electromagnetic field is initially set by the formula describing the electromagnetic field of the electric (magnetic) dipole. We analyze the evolution of this mean electromagnetic field over time and observe the phenomena of harmonic oscillations of the electric (magnetic) dipole moment far from the center of the initial field configuration, as well as the emergence of a spherical shock wave propagating at the speed of light near the center. Additionally, we discover a unique axisymmetric mean electric field configuration accompanying the mean magnetic field in magnetic dipole-charged states.
Article
Physics, Particles & Fields
Brett McInnes
Summary: The time-dependence of AdS black hole interior geometries poses challenges to holographic duality and the traversability of wormholes. Quantum circuit complexity of strongly coupled matter can address the first challenge. Data from a phenomenological model show an upper bound on the complexity growth rate, which becomes stricter with the addition of angular momentum. The slowing of black hole interior dynamics at high specific angular momentum also occurs.
Article
Physics, Particles & Fields
M. Beccaria, S. Giombi, A. A. Tseytlin
Summary: This article investigates the superconformal index Z of the 6d (2,0) theory on S5 x S1 and describes it using the quantum M2 brane theory in the large N limit. By studying M2 branes in a twisted product of thermal AdS7 and S4, the leading non-perturbative term at large N is shown to be reproduced by the 1-loop partition function of an instanton M2 brane wrapped on S1 x S2 with S2 c S4. Similarly, the partition function of a defect M2 brane wrapped on thermal AdS3 c AdS7 reproduces the BPS Wilson loop expectation value in the (2,0) theory. The article also comments on the analogy of these results with similar computations in the quantum M2 brane partition function in AdS4 x S7/DOUBLE-STRUCK CAPITAL Zk, which reproduced the corresponding localization expressions in the ABJM 3d gauge theory.
Article
Physics, Particles & Fields
Carlos Silva
Summary: This paper explores the nature of spacetime in quantum gravity based on a new version of the holographic principle that establishes a connection between string theory and polymer holonomy structures. The research findings suggest that, for this relationship to hold, spacetime must be perceived as emerging from a fundamental structure with degrees of freedom corresponding to quantum correlations only.
Article
Physics, Particles & Fields
A. Senol, H. Denizli, C. Helveci
Summary: This study investigates new physics using a Monte Carlo method, and the results show stronger limitations on anomalous quartic gauge couplings compared to previous experiments.
