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We propose a method to relate the holographic minimal information density to the de Broglie's wavelength at a given universe temperature $T$. To figure this out, we assume that the thermal length of massive and massless constituents…

广义相对论与量子宇宙学 · 物理学 2017-07-11 Orlando Luongo

We propose a new form for equations of state (EOS) of thermodynamic systems in the Ising universality class. The new EOS guarantees the correct universality and scaling behavior close to critical points and is formulated in terms of the…

统计力学 · 物理学 2014-02-07 Arnold Neumaier

If nonrelativistic dark matter and radiation are allowed to interact, reaching an approximate thermal equilibrium, this interaction induces a bulk viscous pressure changing the effective one-fluid description of the universe dynamics,…

宇宙学与河外天体物理 · 物理学 2026-03-18 Hermano Velten , William Iania

A Gribov-type dispersion relation is treated as an effective description of interacting gluons forming a hot medium. Temperature dependence of the Gribov parameter is determined from the fit to the lattice Yang-Mills results describing…

核理论 · 物理学 2017-03-24 Viktor Begun , Wojciech Florkowski , Radoslaw Ryblewski

We investigate the thermal photon production-rates using one dimensional boost-invariant second order relativistic hydrodynamics to find proper time evolution of the energy density and the temperature. The effect of bulk-viscosity and…

高能物理 - 唯象学 · 物理学 2015-03-17 Jitesh R. Bhatt , Hiranmaya Mishra , V. Sreekanth

In this article we extend an axion F(R) gravity model, and apply the holographic principle to describe in a unifying manner the early and the late-time universe when the general equation of state (EoS) contains a bulk viscosity. We assume a…

广义相对论与量子宇宙学 · 物理学 2023-11-23 I. Brevik , A. V. Timoshkin

The dispersion relation of longitudinal electrostatic oscillations in a relativistic plasma is studied in the context of the nonextensive statistics formalism proposed by Tsallis [C. Tsallis, J. Stat. Phys. {\bf 52}, 479 (1988)], where…

等离子体物理 · 物理学 2007-05-23 Victor Munoz

Existence of the density limit in the helicon plasma sources is critically revisited. The low- and high-frequency regimes of a helicon plasma source operation are distinguished. In the low-frequency regime with $\omega <…

等离子体物理 · 物理学 2015-06-22 Igor A. Kotelnikov

We estimate bulk and shear viscosity at finite temperature and baryon densities of hadronic matter within hadron resonance gas model. For bulk viscosity we use low energy theorems of QCD for the energy momentum tensor correlators. For shear…

高能物理 - 唯象学 · 物理学 2015-05-20 Guru Prakash Kadam , Hiranmaya Mishra

We consider a Vlasov equation for a plasma with a given constant magnetic field, and introduce a white noise perturbation of the electric field in the electrostatic approximation, with a discussion of the motivations of such random…

概率论 · 数学 2025-07-15 Franco Flandoli , Dejun Luo

From the viewpoint of AdS/CFT correspondence, we investigate the holographic thermalization process in a four dimensional Einstein-Maxwell-axions gravity theory, which is considered as a simple bulk theory dual to a boundary theory with…

高能物理 - 理论 · 物理学 2020-06-16 Yong-Zhuang Li , Xiao-Mei Kuang

We investigate the crystallization rate of a one-component plasma (OCP) in the context of classical nucleation theory. From our derivation of the free energy of an arbitrary distribution of solid clusters embedded in a liquid phase, we…

天体物理学 · 物理学 2009-06-23 Randall L. Cooper , Lars Bildsten

We study the influence of the factor of electron-ion collisions on the solution of the Cauchy problem in the one-dimensional relativistic model of cold plasma and show that, depending on their intensity and initial data, two scenarios are…

数学物理 · 物理学 2021-09-29 Olga S. Rozanova , Eugeniy V. Chizhonkov

The shear ($\eta$) and bulk ($\zeta$) viscosities are calculated in a quasiparticle relaxation time approximation for a hadron matter described within the relativistic mean-field based model with scaled hadron masses and couplings.…

核理论 · 物理学 2011-05-05 A. S. Khvorostukhin , V. D. Toneev , D. N. Voskresensky

One of the most remarkable features of the Quark Gluon Plasma is its nearly perfect fluidity behavior indicated by the small shear viscosity to entropy density ratio obtained from fitting relativistic viscous hydrodynamics flow harmonics to…

核理论 · 物理学 2015-12-22 Jacquelyn Noronha-Hostler

Accurate prediction of electron temperature ($T_{\rm e}$) in non-equilibrium {plasma} flows is critical, yet hampered by inadequate models for electron heating from vibrationally excited states. Prior models often relied on ad-hoc scaling…

等离子体物理 · 物理学 2025-09-23 Felipe Martin Rodriguez Fuentes , Bernard Parent

We perform a study on the evolution of helical quantum turbulence at different temperatures by solving numerically the Gross-Pitaevskii and the Stochastic Ginzburg-Landau equations, using up to $4096^3$ grid points with a pseudospectral…

流体动力学 · 物理学 2018-09-26 P. Clark di Leoni , P. D. Mininni , M. -E. Brachet

The bulk viscosity ($\zeta$) of the hadronic medium has been estimated within the ambit of the Hadron Resonance Gas (HRG) model including the Hagedorn density of states. The HRG thermodynamics within a grand canonical ensemble provides the…

核理论 · 物理学 2017-04-12 Golam Sarwar , Sandeep Chatterjee , Jan-e Alam

In this work, we have studied how incorporating viscous fluids leads to exact bounce cosmological solutions in general relativity (GR) framework. Specifically, we propose a novel parameterization of bulk viscosity coefficient of the form…

广义相对论与量子宇宙学 · 物理学 2024-07-23 Rajdeep Mazumdar , Mrinnoy M. Gohain , Kalyan Bhuyan

The free electron model with Boltzmann statistics for spherical low-density plasmas (Scientific Reports 9. 20384, 2019) is developed further by numerical calculations with asymptotic relations obtaining the density of electrons, mass…

综合物理 · 物理学 2021-03-10 Y. Ben-Aryeh