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A spatially flat Friedmann-Robertson-Walker background with a general scale factor is considered. In this space-time, the energy-momentum tensor of the scalar field with a general curvature coupling parameter is obtained. Using the Thermo…

高能物理 - 理论 · 物理学 2020-07-15 A. F. Santos , S. C. Ulhoa , Faqir C. Khanna

In any medium there are fluctuations due to temperature or due to the quantum nature of its constituents. If a material body is immersed into such a medium, its shape and the properties of its constituents modify the properties of the…

统计力学 · 物理学 2022-12-27 D. M. Dantchev , S. Dietrich

We present both analytical and numerical results for the behaviour of the Casimir force in a Ginzburg-Landau type model of a film of a simple fluid or binary liquid mixture in which the confining surfaces are strongly adsorbing but…

统计力学 · 物理学 2018-11-06 Daniel Dantchev , Vassil Vassilev , Peter Djondjorov

In discussions of the cosmological constant, the Casimir effect is often invoked as decisive evidence that the zero point energies of quantum fields are "real''. On the contrary, Casimir effects can be formulated and Casimir forces can be…

高能物理 - 理论 · 物理学 2009-11-11 R. L. Jaffe

Based on a perturbative approach, a series expansion in susceptibility function of the medium is obtained for the Casimir force between arbitrary shaped objects immersed in a scalar or vector fluctuating field in arbitrary dimensions.…

量子物理 · 物理学 2015-06-05 Fardin Kheirandish , Marjan Jafari

A general theory of thermal magnetic fluctuations near conductive materials is developed; such fluctuations are the magnetic analog of Johnson noise. For realistic experiments in quantum computing and magnetic resonance force microscopy,…

量子物理 · 物理学 2007-05-23 J. A. Sidles , J. L. Garbini , W. M. Dougherty , S. H. Chao

We calculate the Casimir force and free energy for plane metallic mirrors at non-zero temperature. Numerical evaluations are given with temperature and conductivity effects treated simultaneously. The results are compared with the…

量子物理 · 物理学 2009-11-06 Cyriaque Genet , Astrid Lambrecht , Serge Reynaud

On the examples of the quantum-electrodynamical Casimir force, as well as critical Casimir and Helmholtz forces, we present a review of some results available for the class of fluctuation induced forces. In addition, we also concisely…

统计力学 · 物理学 2024-06-17 Daniel Dantchev

The power spectrum of finite-temperature quantum electromagnetic fluctuations produced by elementary charge carriers under the influence of external electric field is investigated. It is found that under the combined action of the photon…

量子物理 · 物理学 2009-11-13 Kirill A. Kazakov

We provide a review of both new experimental and theoretical developments in the Casimir effect. The Casimir effect results from the alteration by the boundaries of the zero-point electromagnetic energy. Unique to the Casimir force is its…

量子物理 · 物理学 2008-11-26 M. Bordag , U. Mohideen , V. M. Mostepanenko

In this paper, the finite temperature Casimir force acting on a two-dimensional Casimir piston due to electromagnetic field is computed. It was found that if mixed boundary conditions are assumed on the piston and its opposite wall, then…

高能物理 - 理论 · 物理学 2009-03-19 L. P. Teo

We study the motion of a slow quantum impurity in one-dimensional environments focusing on systems of strongly interacting bosons and weakly interacting fermions. While at zero temperature the impurity motion is frictionless, at low…

量子气体 · 物理学 2020-03-11 Aleksandra Petkovic

We propose the dynamical Casimir effect in a time-modulated near-field system at finite temperatures. The system consists of two bodies made of polaritonic materials, that are brought in close proximity to each other, and the modulation…

量子物理 · 物理学 2025-09-11 Renwen Yu , Shanhui Fan

We compare theoretical expectations for the Casimir force with the results of precise measurements. The force is calculated at finite temperature for multilayered covering of the bodies using the Lifshitz theory. We argue that the…

量子物理 · 物理学 2007-05-23 V. B. Svetovoy , M. V. Lokhanin

The Casimir-Lifhitz force acts between neutral material bodies and is due to the fluctuations (around zero) of the electrical polarizations of the bodies. This force is a macroscopic manifestation of the van der Waals forces between atoms…

量子物理 · 物理学 2022-01-28 Iver Brevik , Boris Shapiro

We propose a definitive test of whether plates involved in Casimir experiments should be modeled with ballistic or diffusive electrons--a prominent controversy highlighted by a number of conflicting experiments. The unambiguous test we…

量子物理 · 物理学 2015-06-30 Andrew A. Allocca , Justin H. Wilson , Victor Galitski

We study the statistical fluctuations of the Casimir potential felt by an atom approaching a dielectric disordered medium. Starting from a microscopic model for the disorder, we calculate the variance of potential fluctuations in the limit…

量子物理 · 物理学 2015-04-15 Nicolas Cherroret , Romain Guérout , Astrid Lambrecht , Serge Reynaud

We consider the Casimir effect in a (1+1)-dimensional model with a critical mode. Such a mode gives rise to a condensate described by the nonlinear Gross-Pitaevskii equation. In the condensate, there are two sources of the Casimir force;…

量子物理 · 物理学 2025-02-14 M. Bordag , I. G. Pirozhenko

Piezoelectric quartz tuning forks have been employed as the force sensor in a dynamic mode scanning force microscope operating at temperatures down to 1.7 K at He-gas pressures of typically 5 mbar. An electrochemically etched tungsten tip…

凝聚态物理 · 物理学 2009-10-31 J. Rychen , T. Ihn , P. Studerus , A. Herrmann , K. Ensslin , H. J. Hug , P. J. A. van Schendel , H. J. Guentherodt

We compare theory and experiment in the Casimir force measurement between gold surfaces performed with the atomic force microscope. Both random and systematic experimental errors are found leading to a total absolute error equal to 8.5 pN…

量子物理 · 物理学 2009-11-10 F. Chen , G. L. Klimchitskaya , U. Mohideen , V. M. Mostepanenko