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相关论文: Bardeen solution with a cloud of strings

200 篇论文

We revisit the study of string theory close to the Hagedorn temperature with the aim towards cosmological applications. We consider interactions of open and closed strings in a gas of D$p-$branes, and/or one isolated D$p$-brane, in an…

高能物理 - 理论 · 物理学 2024-03-25 Andrew R. Frey , Ratul Mahanta , Anshuman Maharana , Francesco Muia , Fernando Quevedo , Gonzalo Villa

In this work, we present a generalization of the cloud of strings model originally proposed by Letelier, by introducing a magnetic-like component, $\Sigma_{23}$, in addition to the electric-like component, $\Sigma_{01}$, considered in the…

广义相对论与量子宇宙学 · 物理学 2025-07-17 G. Alencar , R. R. Landim , R. N. Costa Filho

We study the single-particle distributions of three-dimensional hard sphere gas described by the Boltzmann equation. We focus on the steady homogeneous isotropic solutions in thermodynamically open conditions, i.e. in the presence of…

混沌动力学 · 物理学 2011-10-10 Davide Proment , Sergey Nazarenko , Pietro Asinari , Miguel Onorato

The presented paper is an attempt to investigate the dynamical states of an hydrodynamical isothermal turbulent self-gravitating system using some powerful tools of the classical thermodynamics. Our main assumption, inspired by the work of…

星系天体物理 · 物理学 2023-11-21 Sava Donkov , Ivan Zh. Stefanov , Todor V. Veltchev

We obtain an exact solution of Einstein's equations for a charged, static and spherically symmetric body, surrounded by a fluid of strings and with a cosmological constant. This corresponds to the Reissner-Nordstr\"om (de Sitter)-Anti de…

广义相对论与量子宇宙学 · 物理学 2020-12-30 J. M. Toledo , V. B. Bezerra

The purpose of the present article is to call attention to some realistic quasiparticle-based description of the quark/gluon matter and its consistent implementation in thermodynamics. A simple and transparent representation of the…

核理论 · 物理学 2014-11-18 T. S. Biro , A. A. Shanenko , V. D. Toneev

We investigate a one-dimensional water-like lattice model with Van der Waals and hydrogen-bond interactions, allowing for particle number fluctuations through a chemical potential. The model, defined on a chain with periodic boundary…

统计力学 · 物理学 2025-11-25 F. F. Braz , S. M. de Souza , M. L. Lyra , Onofre Rojas

Motivated by the violation of Lorentz invariancy in quantum gravity, we study black hole solutions in gravity's rainbow in context of Einstein gravity coupled with various models of nonlinear electrodynamics. We regard an energy dependent…

广义相对论与量子宇宙学 · 物理学 2018-10-22 S. H. Hendi , S. Panahiyan , B. Eslam Panah , M. Momennia

We investigate the extended phase space thermodynamics of nonsingular-AdS black holes minimally coupled to clouds of strings in which we consider the cosmological constant ($\Lambda$) as the pressure ($P$) of the black holes and its…

广义相对论与量子宇宙学 · 物理学 2022-04-14 Ashima Sood , Arun Kumar , J. K. Singh , Sushant G. Ghosh

A simple expression for the composition dependence of the Flory-Huggins interaction parameter of polymer/solvent systems reported earlier is used to model the demixing of polymer solutions into two liquid phases. To this end the system…

软凝聚态物质 · 物理学 2007-05-23 Sergej Stryuk , Bernhard A. Wolf

A thermodynamic phase transition denotes a drastic change of state of a physical system due to a continuous change of thermodynamic variables, as for instance pressure and temperature. The classical van der Waals equation of state is the…

数学物理 · 物理学 2015-06-16 Antonio Moro

We compute the high energy entropy and the equation of state of a gas of open superstrings in the infinite volume limit focusing on the calculation of the number of strings as a function of energy and volume. We do it in the fixed…

高能物理 - 理论 · 物理学 2016-08-16 Manuel A. Cobas , M. A. R. Osorio , María Suárez

We investigate the occurrence of waterlike thermodynamic and dynamic anomalous behavior in a one dimensional lattice gas model. The system thermodynamics is obtained using the transfer matrix technique and anomalies on density and…

In this paper, we present an exact spherically symmetric and Yang-Mills charged AdS black hole solution in the context of $4D$ Einstein-Gauss-Bonnet (EGB) gravity in the presence of a cloud of strings. The regularity of the solution is…

高能物理 - 理论 · 物理学 2026-05-26 Faramarz Rahmani , Mehdi Sadeghi

We construct steady non-spherical bubbles and drops, which are traveling wave solutions to the axisymmetric two-phase Euler equations with surface tension, whose inner phase is a bounded connected domain. The solutions have a uniform…

偏微分方程分析 · 数学 2025-03-10 David Meyer , Lukas Niebel , Christian Seis

All high-temperature phases of the known N=4 superstrings in five dimensions can be described by the universal thermal potential of an effective four-dimensional supergravity. This theory, in addition to three moduli s, t, u, contains…

高能物理 - 理论 · 物理学 2008-11-26 I. Bakas , A. Bilal , J. -P. Derendinger , K. Sfetsos

In this paper, we study non-stationary filtration of real gases in porous media. Thermodynamic state of the medium is given by van der Waals state equations. Solutions for non-stationary filtration equation are obtained by means of finite…

数学物理 · 物理学 2020-01-31 Valentin Lychagin , Mikhail Roop

The thermodynamics of liquids and supercritical fluids is notorious for eluding a general theory, as can be done for crystalline solids on the basis of phonons and crystal symmetry. The extension of solid state notions such as…

软凝聚态物质 · 物理学 2024-03-06 Cillian Cockrell , Aleksandra Dragović

In General Relativity, cosmic strings are well known to produce a static, locally flat spacetime with a wedge removed. If the tension exceeds a critical value, the deficit angle becomes larger than $ 2\pi $, leading to a compact exterior…

广义相对论与量子宇宙学 · 物理学 2015-05-20 Florian Niedermann , Robert Schneider

In this paper, we examine the effects of space noncommutativity on the thermodynamics of a Bardeen charged regular black hole. For a suitable choice of sets of parameters, the behavior of the singularity, horizon, mass function, black hole…

广义相对论与量子宇宙学 · 物理学 2015-05-30 M. Sharif , Wajiha Javed