Article
Astronomy & Astrophysics
Robert B. Mann, Behnam Pourhassan, Prabir Rudra
Summary: This paper explores the thermodynamic properties of a thin black ring in AdS space-time, finding that its angular momentum to mass ratio has an upper limit relative to the cosmological radius. The research indicates that the small black ring is thermodynamically stable due to the effects introduced by thermal fluctuations, but less stable than thermal AdS. Thermodynamic analysis shows no critical point, but rather a Hawking-Page transition to radiation, confirmed by Gibbs free energy analysis.
Article
Astronomy & Astrophysics
Shahid Chaudhary, Abdul Jawad, Muhammad Yasir
Summary: This work investigates the thermodynamic geometry of spherically symmetric black holes in AdS spacetime, revealing that enthalpy is the central thermodynamic quantity and identifying the curvatures and repulsive interaction information among black hole molecules in different phase spaces. Additionally, the thermal stability of AdS black holes in Einstein-Maxwell-scalars theory and regularized Lovelock theory is analyzed, with the observation that momentum relaxation parameter and coupling constants increase the thermal stability of the black holes. The study also delves into the Joule-Thomson expansion for black holes in regularized Lovelock theory.
Article
Astronomy & Astrophysics
Nobuyoshi Komatsu
Summary: This article explores the energy storage and thermodynamic fluctuations on the cosmic horizon. It establishes that a flat universe closely resembles a de Sitter universe and uses the holographic equipartition law to calculate the energy density on the Hubble horizon of a de Sitter universe. The findings suggest that the energy stored on the horizon is related to effective dark energy and the maximum storage energy behaves like effective vacuum-like energy. Additionally, the study examines thermodynamic fluctuations on the horizon and finds them to be a universal constant corresponding to the Planck energy.
Article
Physics, Particles & Fields
Abdul Jawad, Usman Zafar
Summary: In this work, the maximum force conjecture and thermal fluctuations for different black holes were explored. The thermodynamical parameters for these black holes were reviewed and the stability conditions were examined. The stability of the black holes in different ensembles was compared to determine which one is consistent.
Article
Physics, Particles & Fields
Shi-Bei Kong, Haximjan Abdusattar, Yihao Yin, Hongsheng Zhang, Ya-Peng Hu
Summary: In this paper, we derive the equations of state for the FRW universe in Einstein gravity and a modified gravity. The equation of state from Einstein gravity shows no P-V phase transition, while the equation of state from the modified gravity does, with the critical exponents being the same as those in mean field theory.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Materials Science, Multidisciplinary
Martin Hohenadler, Yuhai Liu, Toshihiro Sato, Zhenjiu Wang, Wenan Guo, Fakher F. Assaad
Summary: The thermodynamic and dynamical properties of a model of Dirac fermions with a deconfined quantum critical point (DQCP) separating an interaction-generated quantum spin Hall insulator from an s-wave superconductor have been studied. Quantum Monte Carlo simulations were used to investigate the characteristics within the deconfined quantum critical region. Spinons and spinless charge-2e skyrmions were found to emerge within this region. The study also revealed that the model conserves total spin and charge, and has a single length scale, resulting in a linear temperature dependence of the uniform spin and charge susceptibilities. Furthermore, the order parameter dynamic structure factors at the DQCP exhibited remarkable similarities that supported emergent Lorentz symmetry. Additionally, it was observed that the proliferation of spin-1/2 vortices led to the destruction of superconductivity above a critical temperature.
Article
Astronomy & Astrophysics
Ran Li, Jin Wang
Summary: In this study, we analyze the Hawking radiation and P - v criticality of charged dynamical (Vaidya) black hole in AdS space. By examining the near horizon properties of scalar field, we determine the Hawking temperature of the dynamical charged AdS black hole. Our results show that the critical pressure, volume, and temperature relationship is modified by the dynamical nature of the black hole, while the critical exponents remain unaffected. Additionally, the P - v criticality of the charged dynamical AdS black hole will disappear if the rate of change of the black hole horizon exceeds the critical value.
Article
Physics, Multidisciplinary
Giulia Rubino, Gonzalo Manzano, Caslav Brukner
Summary: The authors discuss the physical possibility and observability of superpositions of quantum processes with opposite time's arrows, as well as the role of interference terms in thermodynamics. By quantum measurement of entropy production, a definite thermodynamic time's arrow can be restored, projecting superpositions onto the forward (time-reversal) time-direction when large positive (negative) values are measured. Additionally, interference between forward and time-reversal processes can lead to entropy-production distributions featuring a more reversible process than either component individually.
COMMUNICATIONS PHYSICS
(2021)
Article
Physics, Particles & Fields
Houcine Aounallah, Behnam Pourhassan, Seyed Hossein Hendi, Mir Faizal
Summary: This paper analyzes a five-dimensional Yang-Mills black hole solution in massive gravity's rainbow, investigates the flow of such a solution with scale, discusses the scale dependence of the thermodynamics for this black hole, studies the criticality in the extended phase space treating the cosmological constant as the thermodynamics pressure, and uses the partition function to obtain corrections to the thermodynamics of this system and examine their key role in the behavior of corrected solutions.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Multidisciplinary
M. Sharif, Qanitah Ama-Tul-Mughani
Summary: This paper analyzes the critical phenomena and phase transition of Kerr-Sen-anti-de Sitter black hole using Maxwell equal-area law and van der Waal-like equation of state, finding the former technique more proficient for complicated black holes. By constructing phase diagram and studying the impact of thermal fluctuations, it is concluded that black holes below critical pressure exhibit similar phase transition as liquid-gas van der Waal fluid.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Materials Science, Multidisciplinary
Hudson Borja da Rocha, Lev Truskinovsky
Summary: Power law distributed fluctuations are known to accompany terminal failure in disordered brittle solids, emerging universally from threshold-type nonlinearity, quenched disorder, and long-range interactions. Systems are expected to transition between brittle and quasi-brittle (ductile) responses, characterized by a power law distribution of avalanches in the former and predominantly Gaussian statistics of avalanches in the latter. The self-tuning of the system towards the boundary separating brittle and ductile regimes is indicated by robust criticality observed in cases like earthquakes and collapsing porous materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Astronomy & Astrophysics
Behzad Eslam Panah, Khadijie Jafarzade
Summary: This paper investigates the thermodynamic features of charged rotating accelerating black holes in anti-de Sitter spacetime. It analyzes thermal stability/instability using heat capacity in the canonical ensemble, and studies the effects of angular momentum, electric charge, and string tension on thermodynamic quantities and system stability. By considering the known relation between pressure and the cosmological constant, critical quantities are extracted and the impacts of the mentioned parameters on them are discussed. Furthermore, a heat engine is constructed using the black hole as the working substance, and the heat engine efficiency is obtained by considering a rectangular heat cycle in the P-V plane. The effects of black hole parameters on the efficiency are examined and their effective roles are analyzed. Finally, the paper investigates the conditions for a consistent fulfillment of the thermodynamic second law by comparing the engine efficiency with Carnot efficiency.
GENERAL RELATIVITY AND GRAVITATION
(2022)
Article
Physics, Fluids & Plasmas
Domingos S. P. Salazar
Summary: The detailed fluctuation theorem (DFT) provides a statement about the asymmetry in the statistics of entropy production. It has been found that the DFT imposes a negative tight lower bound for the skewness of entropy production as a function of the mean.
Editorial Material
Physics, Multidisciplinary
Denys Makarov
Summary: The research team successfully demonstrated an experimental realization of an artificial spin glass, utilizing an arrangement of Ising-type permalloy nanomagnets to mimic the structure of artificial spin ice, along with a particular type of neural network.
Article
Physics, Fluids & Plasmas
A. E. Allahverdyan, S. G. Gevorkian, Yu. A. Dyakov, Pao-Kuan Wang
Summary: The notion of mean temperature is crucial but lacks a thermodynamic foundation. We propose a thermodynamic definition based on equilibration processes and energy-entropy principles. Our method works for any nonequilibrium initial state.