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Multistep dynamical phase transition from the locked to the running state of atoms in response to a dc external force is studied by MD simulations of the generalized Frenkel-Kontorova model in the underdamped limit. We show that the…

统计力学 · 物理学 2009-10-30 Maxim Paliy , Oleg Braun , Thierry Dauxois , Bambi Hu

The solid-liquid phase-diagram of charge-stabilized colloidal suspensions is calculated using a technique that combines a continuous Poisson-Boltzmann description for the microscopic electrolyte ions with a molecular-dynamics simulation for…

软凝聚态物质 · 物理学 2009-11-07 J. Dobnikar , R. Rzehak , H. H. von Gruenberg

To facilitate the analysis of pattern formation and of the related phase transitions in Bose-Einstein condensates (BECs) we present an explicit approximate mapping from the nonlocal Gross-Pitaevskii equation with cubic nonlinearity to a…

斑图形成与孤子 · 物理学 2022-11-11 Alina B. Steinberg , Fabian Maucher , Svetlana V. Gurevich , Uwe Thiele

The A+B --> C reaction-diffusion process is studied in a system where the reagents are separated by a semipermeable wall. We use reaction-diffusion equations to describe the process and to derive a scaling description for the long-time…

统计力学 · 物理学 2009-10-30 B. Chopard , M. Droz , J. Magnin , Z. Racz

A thermodynamically consistent density functional-perturbation theory is used to study the isostructural solid-to-solid transition which takes place in the hard sphere/attractive Yukawa system when the Yukawa tail is sufficiently…

凝聚态物理 · 物理学 2009-10-28 C. Rascon , L. Mederos , G. Navascues

We observed a phase transition-like behavior that is marked by the onset of the realization of the connectivity between two sites on a two-dimensional cross-section of a three-dimensional percolation cluster. This was found using…

无序系统与神经网络 · 物理学 2009-11-07 Nira Shimoni , Doron Azulai , Isaac Balberg , Oded Millo

We study the static screening in a Hubbard-like model using fixed-node diffusion Monte Carlo. We find that the random phase approximation is surprisingly accurate even for metallic systems close to the Mott transition. As a specific…

强关联电子 · 物理学 2007-05-23 Erik Koch , Olle Gunnarsson , Richard M. Martin

We study the ground-state properties of a system of dimers. Each dimer consists in a pair of equivalent charges at a fixed distance, immersed in a neutralizing homogeneous background. All charges interact pairwisely by Coulomb potential.…

统计力学 · 物理学 2018-01-11 Igor Travěnec , Ladislav Šamaj

We study the phase behavior and the interfacial tension of the screened Coulomb (Yukawa) restricted primitive model (YRPM) of oppositely charged hard spheres with diameter s using Monte Carlo simulations. We determine the gas-liquid and…

软凝聚态物质 · 物理学 2009-11-11 Andrea Fortini , Antti-Pekka Hynninen , Marjolein Dijkstra

We introduce simple prescriptions of the Yukawa potential to describe the effect of size polydispersity and macroion shielding effect in charged colloidal systems. The solid-liquid phase boundaries were presented with the Lindemann…

统计力学 · 物理学 2009-11-11 Yong Chen

The experimental status and theoretical uncertainties of the Cabibbo--Kobayashi--Maskawa (CKM) matrix describing the charge-changing weak transitions between quarks with charges -1/3 ($d, s, b$) and 2/3 ($u, c, t$) are reviewed. Some recent…

高能物理 - 唯象学 · 物理学 2007-05-23 Jonathan L. Rosner

Particles dispersed in a liquid crystal above the nematic-isotropic phase transition are wetted by a surface-induced corona of paranematic order. Such coronas give rise to pronounced two-particle interactions. In this article, we report…

软凝聚态物质 · 物理学 2009-11-10 Paolo Galatola , Jean-Baptiste Fournier , Holger Stark

We study a contact process on a two-dimensional square lattice which is diluted by randomly removing bonds with probability p. For p<1/2 and varying birth rate $\lambda$ the model was shown to exhibit a continuous phase transition which…

统计力学 · 物理学 2009-09-29 Silvio R. Dahmen , L. Sittler , H. Hinrichsen

We have measured the phase behavior of a binary mixture of like-charged colloidal spheres with a size ratio of 0.9 and a charge ratio of 0.96 as a function of particle number density n and composition p. Under exhaustively deionized…

软凝聚态物质 · 物理学 2011-04-05 Nina J. Lorenz , Thomas Palberg

In the framework of potential models for heavy quarkonium the mass spectrum for the system ($\bar b c$) is considered. Spin-dependent splittings, taking into account a change of a constant for effective coulomb interaction between the…

高能物理 - 唯象学 · 物理学 2009-10-28 S. S. Gershtein , V. V. Kiselev , A. K. Likhoded , A. V. Tkabladze

It has been recently conjectured that bridge functions remain nearly invariant along phase diagram lines of constant excess entropy for the broad class of R-simple liquids. To test this hypothesis, the bridge functions of Yukawa systems are…

软凝聚态物质 · 物理学 2024-01-05 F. Lucco Castello , P. Tolias , J. C. Dyre

The present work suggests rigorous criteria to determine phase transitions in Coulomb crystals in a linear ion trap. The proposed method is based on the analysis of a cross size $\rho_i$ and relative polar angle between neighboring…

化学物理 · 物理学 2021-02-18 A. V. Romanova , S. S. Rudyi , Y. V. Rozhdestvensky

Strongly coupled systems occupying the transitional range between the Wigner crystal and fluid phases are most dynamic constituents of the nature. Highly localized but strongly interacting elements in this phase posses enough thermal energy…

等离子体物理 · 物理学 2023-03-22 Prince Kumar , Devendra Sharma

The dynamics of atom-molecule conversion system subject to dephasing noises is studied in this paper. With the dephasing master equation and the mean-field theory, we drive a Bloch equation for the system, this equation is compared with the…

量子物理 · 物理学 2015-06-16 H. Z. Shen , Xiao-Ming Xiu , X. X. Yi

We consider a classical XY-like Hamiltonian on a body-centered tetragonal lattice, focusing on the role of interlayer frustration. A three-dimensional (3D) ordered phase is realized via thermal fluctuations, breaking the mirror-image…

强关联电子 · 物理学 2012-03-12 Yoshitomo Kamiya , Naoki Kawashima , Cristian D. Batista