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Motivated by gravitational wave observations of binary neutron-star mergers, we study the thermal index of low-density, high-temperature dense matter. We use the virial expansion to account for nuclear interaction effects. We focus on the…

核理论 · 物理学 2025-07-22 Giuseppe Rivieccio , Adriana Nadal-Matosas , Arnau Rios , Milton Ruiz

Recent studies [Class. Quant. Grav. 42, 03LT01 (2025); Phys. Rev. D 111, 045023 (2025)] indicate that in a nested sequence of Rindler wedges, vacuum of former Rindler frame appears to be thermally populated for an observer in shifted…

广义相对论与量子宇宙学 · 物理学 2025-06-09 Dipankar Barman , Bibhas Ranjan Majhi

A static observer with a finite lifetime has causal access to only a limited region of spacetime known as the causal diamond. The presence of an apparent horizon in the causal diamond, due to the observer's finite lifetime, is the origin of…

广义相对论与量子宇宙学 · 物理学 2022-09-14 Abhijit Chakraborty , Horacio Camblong , Carlos Ordonez

A "circular orbital forcing" makes a chosen point on a rigid body follow a circular motion while the body spins freely around that point. We investigate this problem for the planar motion of a body subject to dry friction. We focus on the…

经典物理 · 物理学 2022-01-13 Pablo de Castro , Tiago Araújo Lima , Fernando Parisio

In analyzing the nature of thermal radiance experienced by an accelerated observer (Unruh effect), an eternal black hole (Hawking effect) and in certain types of cosmological expansion, one of us proposed a unifying viewpoint that these can…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Alpan Raval , B. L. Hu , Don Koks

We study the fluctuation-electromagnetic interaction and dynamics of a small spinning polarizable particle moving with a relativistic velocity in a vacuum background of arbitrary temperature. Using the standard formalism of the fluctuation…

介观与纳米尺度物理 · 物理学 2018-03-02 G. V. Dedkov , A. A. Kyasov

We conduct a theoretical study in which we determine the zero-point vacancy concentration in solid 4He at T=0 K. To this end, we employ the quantum-classical isomorphism, by which the quantum-mechanical probability density function of a…

其他凝聚态物理 · 物理学 2008-06-10 R. Pessoa , M. de Koning , S. A. Vitiello

The objective of this work is to analyze the temperature oscillations that occur in a gas in a circular motion under the action of a Reissner-Nordstr\"om gravitational field, verifying the effect of the charge term of the metric on the…

广义相对论与量子宇宙学 · 物理学 2018-12-20 Leandro C. Mehret , Gilberto M. Kremer

We derive a free energy for weakly anisotropic ferromagnets which is valid in the whole temperature range and interpolates between the micromagnetic energy at zero temperature and the Landau free energy near the Curie point T_c. This free…

统计力学 · 物理学 2009-10-31 H. Kachkachi , D. A. Garanin

In this paper the dependence of meson-nucleon-nucleon vertex form factors is studied as a function of termperature. The results are obtained starting from a zero temperature Bonn potential. The temperature dependence of the vertex form…

核理论 · 物理学 2009-10-31 F. C. Khanna , A. M. Rakhimov , U. T. Yakhshiev

Recently, we have demonstrated that for a certain class of Casimir-type systems ("devices") the energy of zero-point vacuum fluctuations reaches its global minimum when the device rotates about a certain axis rather than remains static.…

量子物理 · 物理学 2013-02-12 M. N. Chernodub

We extend a previous analysis of spatial correlation functions for classical electromagnetic vector fields near a perfectly conducting boundary [PRE, vol. 73, 036604 (2006)] to the case of an isotropic semi-infinite medium with planar…

光学 · 物理学 2009-11-13 Luk R. Arnaut

In this paper, we investigate the thermodynamic properties of the noncommutative Dirac oscillator with a permanent electric dipole moment in the presence of an electromagnetic field in contact with a heat bath. Using the canonical ensemble,…

高能物理 - 理论 · 物理学 2022-12-21 R. R. S. Oliveira , R. R. Landim

The effect of radial vibrations on the properties of one or two disks confined to a circular trap in contact with a thermal reservoir are investigated. The vibrational amplitudes and energies are assumed to be quantized, with the motions…

统计力学 · 物理学 2019-08-14 James H. Taylor

We present a comprehensive analysis of hot and dilute isospin-asymmetric nuclear matter employing the temperature-dependent effective-relativistic mean-field theory (E-RMF). The E-RMF is applied to study the effect of $\delta$ and…

核理论 · 物理学 2023-03-15 Vishal Parmar , Manoj K Sharma , S K Patra

We consider an ultra-relativistic wind consisting of electron-positron pairs and photons with the principal goal of finding the asymptotic Lorentz factor $\gamma_{\infty}$ for zero baryon number. The wind is assumed to originate at radius…

天体物理学 · 物理学 2009-10-30 Ole M. Grimsrud , Ira Wasserman

We study the thermal effects on the frictional properties of atomically thin sheets. We simulate a simple model based on the Prandtl-Tomlinson model that reproduces the layer dependence of friction and strengthening effects seen in AFM…

介观与纳米尺度物理 · 物理学 2021-06-08 J Roadnight Sheehan , David Andersson , Astrid S. de Wijn

Radiation force in Abraham-Lorentz-Dirac equation is revisited for possible signature of irreversible action in the dynamics. The analysis shows that the classical electron can dissipate out a certain fraction of field energy that…

经典物理 · 物理学 2021-01-21 D. Das

We present a time-resolved experimental study of the temperature effect on the coherence of traveling polariton condensates. The simultaneous detection of their emission both in real- and reciprocal-space allows us to fully monitor the…

介观与纳米尺度物理 · 物理学 2020-04-23 E. Rozas , M. D. Martín , C. Tejedor , L. Viña , G. Deligeorgis , Z. Hatzopoulos , P. G. Savvidis

We derive non-flat cosmological models for two cases (i.e., dust and radiation) in the context of M{\o}ller's tetradic theory (MTT) of gravitation using the tetrad that creates the non-flat Friedmann-Robertson-Walker (FRW) metric. These two…

广义相对论与量子宇宙学 · 物理学 2022-04-21 G. G. L. Nashed , A. T. Shafeek