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It is proposed that a study of the ratio of shear viscosity to entropy density $\frac{\eta}{s}$ as a function of the baryon chemical potential $\mu_B$, and temperature T, provides a dynamic probe for the critical end point (CEP) in hot and…

The unitarity regime of the BCS-BEC crossover can be realized by diluting a system of two-component lattice fermions with an on-site attractive interaction. We perform a systematic-error-free finite-temperature simulations of this system by…

统计力学 · 物理学 2007-05-23 Evgeni Burovski , Nikolay Prokof'ev , Boris Svistunov , Matthias Troyer

We report a simulation study of the gas-liquid critical point for the square-well potential, for values of well width delta as small as 0.005 times the particle diameter sigma. For small delta, the reduced second virial coefficient at the…

软凝聚态物质 · 物理学 2009-11-13 J. Largo , M. A. Miller , F. Sciortino

Parametric scaling representations are obtained and studied for the asymptotic behavior of interfacial tensions in the \textit{full} neighborhood of a fluid (or Ising-type) critical endpoint, i.e., as a function \textit{both} of temperature…

统计力学 · 物理学 2009-11-10 Shun-yong Zinn , Michael E. Fisher

We investigate the specific heat, $c$, near an Ising nematic quantum critical point (QCP), using sign problem-free quantum Monte Carlo simulations. Cooling towards the QCP, we find a broad regime of temperature where $c/T$ is close to the…

强关联电子 · 物理学 2021-07-16 Ori Grossman , Johannes S. Hofmann , Tobias Holder , Erez Berg

The precise location of the liquid-vapor critical point in aluminum has remained elusive for decades, with reported critical temperatures spanning nearly 4000 K. Here we resolve this long-standing uncertainty by combining deep potential…

统计力学 · 物理学 2026-05-21 Xuyang Long , Kai Luo

By means of Cornwall-Jackiw-Tomboulis effective action approach we investigate a homogeneous dilute weakly interacting Bose gas at finite temperature in vicinity of critical region. A longstanding debate, the shift of critical temperature,…

量子气体 · 物理学 2024-04-02 Nguyen Van Thu , Pham Duy Thanh

We present a new procedure able to identify and measure the critical temperature. This method is based on the divergence of the relaxation time approaching the critical point in quenches from infinite temperature. We introduce a…

统计力学 · 物理学 2015-05-18 Eugenio Lippiello , Alessandro Sarracino

Microcanonical thermostatistics analysis has become an important tool to reveal essential aspects of phase transitions in complex systems. An efficient way to estimate the microcanonical inverse temperature $\beta(E)$ and the microcanonical…

计算物理 · 物理学 2020-04-21 Nelson A. Alves , Lucas D. Morero , Leandro G. Rizzi

It is shown that one can obtain quantitatively accurate values for the superconducting critical temperature within a Hamiltonian framework. This is possible if one uses a renormalized Hamiltonian that contains an attractive…

超导电性 · 物理学 2009-10-30 Andreas Mielke

It is shown that the ratio of the Boyle temperature to the product of critical temperature and critical compressibility factor is equal to the number 9 with high accuracy for 21 real substances as predicted from Van-der-Waals equation of…

其他凝聚态物理 · 物理学 2013-05-08 I. H. Umirzakov

Three dimensional Ising model ferromagnets on different lattices with nearest neighbor interactions, and on simple cubic lattices with equivalent interactions out to further neighbors, are studied numerically. The susceptibility data for…

统计力学 · 物理学 2011-07-28 P. H. Lundow , I. A. Campbell

We investigate the critical end point (CEP) of QCD with two flavours of light dynamical quarks at finite lattice cutoff a=1/4T using a Taylor expansion of the baryon number susceptibility. We find a strong volume dependence of the position…

高能物理 - 格点 · 物理学 2007-05-23 Rajiv Gavai , Sourendu Gupta

We study equilibrium dynamics of a symmetrical binary Lennard-Jones fluid mixture near its consolute criticality. Molecular dynamics simulation results for shear viscosity, $\eta$, from microcanonical ensemble are compared with those from…

统计力学 · 物理学 2018-03-09 Sutapa Roy , Subir K. Das

We study four flavor QCD at nonzero temperature and density by analytic continuation from an imaginary chemical potential. The explored region is T = 0.95 T_c < T < 3.5 T_c, and the baryochemical potentials range from 0 to approx. 500 MeV.…

高能物理 - 格点 · 物理学 2011-09-29 Massimo D'Elia , Maria Paola Lombardo

A critical point (E) is expected in QCD on the temperature (T) versus baryonic chemical potential (\mu) plane. Using a recently proposed lattice method for \mu \neq 0 we study dynamical QCD with n_f=2+1 staggered quarks of physical masses…

高能物理 - 格点 · 物理学 2009-11-10 Z. Fodor , S. D. Katz

To calculate the temperature at which a first-order cosmological phase transition occurs, one must calculate $F_c(T)$, the free energy of a critical bubble configuration. $F_c(T)$ is often approximated by the classical energy plus an…

高能物理 - 唯象学 · 物理学 2009-10-22 David Brahm , Clarence L. Y. Lee

A systematic investigation on vapor-liquid equilibria (VLE) of dipolar and quadrupolar fluids is carried out by molecular simulation to develop a new Helmholtz energy contribution for equations of state (EOS). Twelve two-center…

化学物理 · 物理学 2009-04-30 Jadran Vrabec , J. Gross

The paper is devoted to the development of a microscopic description of the critical behavior of a cell fluid model with allowance for the contributions from collective variables with nonzero values of the wave vector. The mathematical…

统计力学 · 物理学 2020-07-01 I. V. Pylyuk , O. A. Dobush

Multiparticle collision dynamics (MPC), a particle-based mesoscale simulation technique for com- plex fluid, is widely employed in non-equilibrium simulations of soft matter systems. To maintain a defined thermodynamic state, thermalization…

软凝聚态物质 · 物理学 2015-03-30 Chien-Cheng Huang , Anoop Varghese , Gerhard Gompper , Roland G. Winkler