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Interference and diffraction of two-identical-particles are considered in the context of open quantum systems. This theoretical study is carried out within two approaches, the effective time-dependent Hamiltonian due to Caldirola-Kanai (CK)…

量子物理 · 物理学 2020-01-22 S. V. Mousavi , S. Miret-Artés

Estimating the free energy, as well as other thermodynamic observables, is a key task in lattice field theories. Recently, it has been pointed out that deep generative models can be used in this context [1]. Crucially, these models allow…

By means of parallel tempering Monte Carlo simulations we find strong evidence for a finite-temperature spin-glass transition in a system of diluted classical Heisenberg dipoles randomly placed on the sites of a simple cubic lattice. We…

无序系统与神经网络 · 物理学 2009-12-18 Pawel Stasiak , Michel J. P. Gingras

Dissipative particle dynamics (DPD) and multi-particle collision (MPC) dynamics are powerful tools to study mesoscale hydrodynamic phenomena accompanied by thermal fluctuations. To understand the advantages of these types of mesoscale…

软凝聚态物质 · 物理学 2009-11-11 Hiroshi Noguchi , Norio Kikuchi , Gerhard Gompper

The transport properties of matter have been widely investigated. In particular, shear viscosity over a wide parameter space is crucial for various applications, such as designing inertial confinement fusion (ICF) targets and determining…

统计力学 · 物理学 2025-01-14 Yuqing Cheng , Xingyu Gao , Qiong Li , Yu Liu , Haifeng Song , Haifeng Liu

In this contribution, velocity and its dissipation spectra in turbulent non-premixed jet flames are investigated by using two Direct Numerical Simulation (DNS) databases of temporally evolving jets with different bulk jet Reynolds numbers.…

流体动力学 · 物理学 2019-10-04 Ali Shamooni , Alberto Cuoci , Tiziano Faravelli , Amsini Sadiki

The Polarizable Continuum Model (PCM) can be used in conjunction with Density Functional Theory (DFT) and its time-dependent extension (TDDFT) to simulate the electronic and optical properties of molecules and nanoparticles immersed in a…

材料科学 · 物理学 2015-10-28 Alain Delgado , Stefano Corni , Stefano Pittalis , Carlo Andrea Rozzi

The nature of freezing and melting transitions for a system of model colloids interacting by a DLVO potential in a spatially periodic external potential is studied using extensive Monte Carlo simulations. Detailed finite size scaling…

统计力学 · 物理学 2009-11-07 W. Strepp , S. Sengupta , P. Nielaba

Continuous Spontaneous Localization (CSL) is one possible explanation for dynamically induced collapse of the wave-function during a quantum measurement. The collapse is mediated by a stochastic non-linear modification of the Schrodinger…

量子物理 · 物理学 2015-01-14 Sayantani Bera , Bhawna Motwani , Tejinder P. Singh , Hendrik Ulbricht

We propose a mechanism for testing the theory of collapse models such as continuous spontaneous localization (CSL) by examining the parametric heating rate of a trapped nanosphere. The random localizations of the centre-of-mass for a given…

量子物理 · 物理学 2016-07-20 Daniel Goldwater , Mauro Paternostro , P. F. Barker

A theoretical study is carried out for the cavity cooling of a $\Lambda$-type three level atom in a high-finesse optical cavity with a weakly driven field. Analytical expressions for the friction, diffusion coefficients and the equilibrium…

光学 · 物理学 2015-05-18 Lei Tan , Li-Wei Liu , Yan-Fen Sun

We employ semiclassical theoretical analysis to study laser cooling of free atoms using three-level cascade transitions, where the upper transition is much weaker than the lower one. This represents an alternate cooling scheme, particularly…

原子物理 · 物理学 2015-06-16 Flavio C. Cruz , Michael L. Sundheimer , Wictor C. Magno

Lattice models are crucial for studying thermodynamic properties in many physical, biological and chemical systems. We investigate Lattice Restricted Primitive Model (LRPM) of electrolytes with different discretization parameters in order…

统计力学 · 物理学 2009-11-11 Maxim N. Artyomov , Anatoly B. Kolomeisky

The phase transitions at finite temperatures in the systems described by the Bose-Fermi-Hubbard model are investigated in this work in the framework of the selfconsistent random phase approximation. The case of the hard-core bosons is…

其他凝聚态物理 · 物理学 2010-09-07 T S Mysakovych

We address the problem of parameter estimation for degenerate diffusion processes defined via the solution of Stochastic Differential Equations (SDEs) with diffusion matrix that is not full-rank. For this class of hypo-elliptic diffusions…

统计理论 · 数学 2024-09-04 Yuga Iguchi , Alexandros Beskos

Progress in understanding multi-scale collisionless plasma phenomena requires employing tools which balance computational efficiency and physics fidelity. Collisionless fluid models are able to resolve spatio-temporal scales that are…

等离子体物理 · 物理学 2025-04-30 Emil R. Ingelsten , Madox C. McGrae-Menge , E. Paulo Alves , Istvan Pusztai

The collective dynamics in liquid water is an active research topic experimentally, theoretically and via simulations. Here, ab initio molecular dynamics simulations are reported in heavy and ordinary water at temperature 323.15 K, or…

软凝聚态物质 · 物理学 2016-03-24 T. Bryk , A. P. Seitsonen

Denoising Diffusion Probabilistic Models (DDPM) are powerful state-of-the-art methods used to generate synthetic data from high-dimensional data distributions and are widely used for image, audio, and video generation as well as many more…

机器学习 · 统计学 2025-04-25 Iskander Azangulov , George Deligiannidis , Judith Rousseau

We study a model of a general compressible viscous fluid subject to the Coulomb friction law boundary condition. For this model, we introduce a dissipative formulation and prove the existence of dissipative solutions. The proof of this…

偏微分方程分析 · 数学 2024-02-22 Sarka Necasova , Justyna Ogorzaly , Jan Scherz

We present high-resolution thermal diffusivity measurements on several near optimally doped electron- and hole-doped cuprate systems in a temperature range that passes through the Mott-Ioffe-Regel limit, above which the quasiparticle…