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We prove the existence of weak solutions to a system of two diffusion equations that are coupled by a pointwise volume constraint. The time evolution is given by gradient dynamics for a free energy functional. Our primary example is a model…

偏微分方程分析 · 数学 2020-03-18 Clément Cancès , Daniel Matthes

We investigate an interacting two-fluid cosmological model and introduce a scalar field representation by means of a linear combination of the individual energy densities. Applying the integrability condition to the scalar field equation we…

天体物理学 · 物理学 2008-11-26 Luis Chimento , Monica Forte

The quantum van der Waals (QvdW) extension of the ideal hadron resonance gas (HRG) model which includes the attractive and repulsive interactions between baryons -- the QvdW-HRG model -- is applied to study the behavior of the baryon number…

核理论 · 物理学 2018-03-14 Volodymyr Vovchenko , Paolo Alba , Mark I. Gorenstein , Horst Stoecker

The microscopic approach to the description of the phase behaviour and critical phenomena in binary fluid mixtures is proposed. It is based on the method of collective variables with a reference system. The physical nature of the order…

凝聚态物理 · 物理学 2009-10-31 O. V. Patsahan

A collisional model of a confined quasi-two-dimensional granular mixture is considered to analyze homogeneous steady states. The model includes an effective mechanism to transfer the kinetic energy injected by vibration in the vertical…

统计力学 · 物理学 2020-12-30 Ricardo Brito , Rodrigo Soto , Vicente Garzó

Beyond the study of individual materials, their interfaces and arising functionality are crucial enablers of fundamental science and technological applications. Recently, the arena of two-dimensional (2D) materials was extended to so-called…

材料科学 · 物理学 2025-03-18 Anastasiia Nihei , Tom Barnowsky , Rico Friedrich

Wigner's quasi-probability distribution function in phase-space is a special (Weyl) representation of the density matrix. It has been useful in describing quantum transport in quantum optics; nuclear physics; decoherence (eg, quantum…

高能物理 - 理论 · 物理学 2008-11-26 Cosmas K Zachos

Sparse matter is characterized by regions with low electron density and its understanding calls for methods to accurately calculate both the van der Waals (vdW) interactions and other bonding. Here we present a first-principles density…

材料科学 · 物理学 2010-06-15 Elisa Londero , Elsebeth Schroder

The Boltzmann equation for inelastic Maxwell models is considered in order to investigate the dynamics of an impurity (or intruder) immersed in a granular gas driven by a uniform shear flow. The analysis is based on an exact solution of the…

统计力学 · 物理学 2015-06-03 V. Garzó , E. Trizac

Even if individual two-dimensional materials own various interesting and unexpected properties, the stacking of such layers leads to van der Waals solids which unite the characteristics of two dimensions with novel features originating from…

介观与纳米尺度物理 · 物理学 2020-06-04 Thorsten Deilmann , Michael Rohlfing , Ursula Wurstbauer

A van der Waals (vdW) charge qubit, electrostatically confined within two-dimensional (2D) vdW materials, is proposed as building block of future quantum computers. Its characteristics are systematically evaluated with respect to its…

介观与纳米尺度物理 · 物理学 2022-11-04 Jiang Cao , Guido Gandus , Tarun Agarwal , Mathieu Luisier , Youseung Lee

Real time rearrangement of particle spectra is studied numerically in a U(1) Gauge+Higgs system, in the unitary gauge and in three spatial dimensions. The cold system starts from the symmetric phase. Evolution of the partial energy…

高能物理 - 格点 · 物理学 2009-11-11 D. Sexty , A. Patkos

The influence of short-range interactions between a multi-phase, multi-component mixture and a solid wall in confined geometries is crucial in life sciences and engineering. In this work, we extend the Cahn-Hilliard model with dynamic…

流体动力学 · 物理学 2023-12-18 Shuang Liu , Yue Wu , Xueping Zhao

Further thermodynamic investigations into the behaviour of a polar dielectric working fluid under non-equilibrium and negative pressure conditions are reported. The establishment of a long-range van der Waals interaction between clathrate…

软凝聚态物质 · 物理学 2022-10-19 Mark Gibbons

We derive upper bounds for Hilbert-Schmidt's quantum coherence of general states of a $d$-level quantum system, a qudit, in terms of its incoherent uncertainty, with the latter quantified using the linear and von Neumann's entropies of the…

量子物理 · 物理学 2020-07-22 Marcos L. W. Basso , Diego S. S. Chrysosthemos , Jonas Maziero

The exact 1+3 covariant dynamical fluid equations for a multi-component plasma, together with Maxwell's equations are presented in such a way as to make them suitable for a gauge-invariant analysis of linear density and velocity…

广义相对论与量子宇宙学 · 物理学 2009-11-07 Mattias Marklund , Peter K. S. Dunsby , Gerold Betschart , Martin Servin , Christos Tsagas

We investigate a one-dimensional model that shows several properties of water. The model combines the long-range attraction of the van der Waals model with the nearest-neighbor interaction potential by Ben-Naim, which is a step potential…

统计力学 · 物理学 2012-09-28 Lotta Heckmann , Barbara Drossel

In this paper, we characterized an analytical and numerical study of the resonant interaction between waves in MHD. A system of evolution equations is derived; we focus on the study of the interaction between a selected triad. The resulting…

偏微分方程分析 · 数学 2020-07-16 Harsh V. Mahara , V. D. Sharma

A thermodynamically consistent framework able to model either diffusive and displacive phase transitions is proposed. The first law of thermodynamics, the balance of linear momentum equation and the Cahn-Hilliard equation for solute mass…

材料科学 · 物理学 2015-03-17 Mirko Maraldi , Luisa Molari , Diego Grandi

We propose a second version of the van der Waals density functional (vdW-DF2) of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)], employing a more accurate semilocal exchange functional and the use of a large-N asymptote gradient…

材料科学 · 物理学 2010-08-17 Kyuho Lee , Éamonn D. Murray , Lingzhu Kong , Bengt I. Lundqvist , David C. Langreth