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We calculate frequencies and damping rates of the lowest collective modes of a dilute Bose gas confined in an anisotropic trapping potential above the Bose-Einstein transition temperature. From the Boltzmann equation with a simplified…

凝聚态物理 · 物理学 2007-05-23 U. Al Khawaja , C. J. Pethick , H. Smith

A lattice model of a hetero-polymer with random hydrophilic-hydrophobic charges interacting with the solvent is introduced, whose continnuum counterpart has been proposed by T. Garel, L. Leibler and H. Orland {J. Phys. II France 4, 2139…

统计力学 · 物理学 2009-10-31 A. Trovato , J. van Mourik , A. Maritan

Quantum Boltzmann machines are natural quantum generalizations of Boltzmann machines that are expected to be more expressive than their classical counterparts, as evidenced both numerically for small systems and asymptotically under various…

量子物理 · 物理学 2019-03-05 Eric R. Anschuetz , Yudong Cao

A paradigm for isothermal, mechanical rectification of stochastic fluctuations is introduced in this paper. The central idea is to transform energy injected by random perturbations into rigid-body rotational kinetic energy. The prototype…

概率论 · 数学 2007-10-18 Nawaf Bou-Rabee , Houman Owhadi

We propose a laser cooling concept for the translational motion of molecules which does not require repeated spontaneous emission by each molecule. The cooling works by repetition of three main steps: velocity selection of a narrow momentum…

量子物理 · 物理学 2007-05-23 C. H. Raymond Ooi , Kar Peter Marzlin , Juergen Audretsch

We propose a novel cooling scheme for realising single photon sideband cooling on particles trapped in a state-dependent optical potential. We develop a master rate equation from an ab-initio model and find that in experimentally feasible…

量子气体 · 物理学 2022-02-11 Federico Berto , Elia Perego , Lucia Duca , Carlo Sias

We present a novel framework exploiting the cascade of phase transitions occurring during a simulated annealing of the Expectation-Maximisation algorithm to cluster datasets with multi-scale structures. Using the weighted local covariance,…

机器学习 · 统计学 2021-01-13 T. Bonnaire , A. Decelle , N. Aghanim

Boltzmann machine is a powerful tool for modeling probability distributions that govern the training data. A thermal equilibrium state is typically used for Boltzmann machine learning to obtain a suitable probability distribution. The…

Traditional simulated annealing utilizes thermal fluctuations for convergence in optimization problems. Quantum tunneling provides a different mechanism for moving between states, with the potential for reduced time scales. We compare…

凝聚态物理 · 物理学 2007-05-23 J. Brooke , D. Bitko , T. F. Rosenbaum , G. Aeppli

We present a new approach to study the thermodynamic properties of $d$-dimensional classical systems by reducing the problem to the computation of ground state properties of a $d$-dimensional quantum model. This classical-to-quantum mapping…

量子物理 · 物理学 2009-11-13 Rolando D. Somma , Cristian D. Batista , Gerardo Ortiz

By combining different ideas, a general and efficient protocol to deal with discontinuous phase transitions at low temperatures is proposed. For small $T$'s, it is possible to derive a generic analytic expression for appropriate order…

统计力学 · 物理学 2015-06-03 C. E. Fiore , M. G. E. da Luz

We present a novel lattice Boltzmann method that has a capability of simulating thermodynamic multiphase flows. This approach is fully thermodynamically consistent at the macroscopic level. Using this new method, a liquid-vapor boiling…

流体动力学 · 物理学 2009-11-07 Raoyang Zhang , Hudong Chen

Generating entanglement by simply cooling a system into a stationary state which is highly entangled has many advantages. Schemes based on this idea are robust against parameter fluctuations, tolerate relatively large spontaneous decay…

量子物理 · 物理学 2015-05-28 J. Busch , S. De , S. S. Ivanov , B. T. Torosov , T. P. Spiller , A. Beige

We propose a model describing $N$ spin-1/2 systems coupled through $N$-order homogeneous interaction terms, in presence of local time-dependent magnetic fields. This model can be experimentally implemented with current technologies in…

量子物理 · 物理学 2018-10-25 R. Grimaudo , L. Lamata , E. Solano , A. Messina

This paper proposes a novel data-driven approach for identifying and modelling areas with similar temperature variations throufigureh clustering and Space-Time AutoRegressive (STAR) models. Using annual temperature data from 168 countries…

应用统计 · 统计学 2026-01-30 Edoardo Otranto

The nested sampling algorithm has been shown to be a general method for calculating the pressure-temperature-composition phase diagrams of materials. While the previous implementation used single-particle Monte Carlo moves, these are…

Bayesian inference with stochastic models is often difficult because their likelihood functions involve high-dimensional integrals. Approximate Bayesian Computation (ABC) avoids evaluating the likelihood function and instead infers model…

Using simulations or experiments performed at some set of temperatures to learn about the physics or chemistry at some other arbitrary temperature is a problem of immense practical and theoretical relevance. Here we develop a framework…

统计力学 · 物理学 2022-10-17 Yihang Wang , Lukas Herron , Pratyush Tiwary

Using the recently introduced parsimonious Metropolis algorithm bead-stick polymers both with infinite-range Lennard-Jones interaction and with truncation are simulated. The focus lays on determining the Boyle temperature for long chains…

软凝聚态物质 · 物理学 2023-09-06 Stefan Schnabel , Wolfhard Janke

We afford an experimentally feasible platform to study Boltzmann negative temperatures. Our proposal takes advantage of well-known techniques of engineering Hamiltonian to achieve steady states with highly controllable population inversion.…

量子物理 · 物理学 2019-05-22 R. J. de Assis , C. J. Villas-Boas , N. G. de Almeida