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We consider the the van der Waals force involving excited atoms in general environments, constituted by magnetodielectric bodies. We develop a dynamical approach studying the dynamics of the atoms and the field, mutually coupled. When only…

量子物理 · 物理学 2017-02-24 Pablo Barcellona , Roberto Passante , Lucia Rizzuto , Stefan Yoshi Buhmann

We study the classical thermal component of Casimir, or van der Waals, forces between point particles with highly anharmonic dipole Hamiltonians when they are subjected to an external electric field. Using a model for which the individual…

介观与纳米尺度物理 · 物理学 2017-02-01 Heino Soo , David Dean , Matthias Krüger

Modifications of Casimir-Polder interactions due to confinement inside a cylindrical cavity and due to curvature in- and outside the cavity are studied. We consider a perfectly conducting cylindrical shell with a single particle (atom or…

统计力学 · 物理学 2015-06-23 Pablo Rodriguez-Lopez , Thorsten Emig , Ehsan Noruzifar , Roya Zandi

The dynamics of a metallic particle confined between charged walls is studied. One wall is fixed and the other moves smoothly and periodically in time. Dissipation is considered by assuming a friction produced by the contact between the…

混沌动力学 · 物理学 2013-12-12 Denis Gouvêa Ladeira , Edson Denis Leonel

Problems in the Lifshitz theory of atom-wall interaction arise when the dc conductivity of dielectric wall is included into the model of the dielectric response. We review the low-temperature behavior of the free energy and entropy of…

量子物理 · 物理学 2015-05-13 G. L. Klimchitskaya , E. V. Blagov , V. M. Mostepanenko

We introduce a class of variational wavefunctions that capture the long-range interaction between neutral systems (atoms and molecules) without changing the diagonal of the density matrix of each monomer. The corresponding energy…

化学物理 · 物理学 2019-03-26 Derk P. Kooi , Paola Gori-Giorgi

Forces induced by quantum fluctuations of electromagnetic field control adhesion phenomena between rough solids when the bodies are separated by distances ~10nm. However, this distance range remains largely unexplored experimentally in…

介观与纳米尺度物理 · 物理学 2020-06-09 V. B. Svetovoy , A. V. Postnikov , I. V. Uvarov , F. I. Stepanov , G. Palasantzas

We explore a feasibility of measuring atom-wall interaction using atomic clocks based on atoms trapped in engineered optical lattices. Optical lattice is normal to the wall. By monitoring the wall-induced clock shift at individual wells of…

原子物理 · 物理学 2015-05-13 A. Derevianko , B. Obreshkov , V. A. Dzuba

We investigate the time-dependent Casimir-Polder potential of a polarizable two-level atom placed near a surface of arbitrary material, after a sudden change in the parameters of the system. Different initial conditions are taken into…

量子物理 · 物理学 2015-06-18 Harald R. Haakh , Carsten Henkel , Salvatore Spagnolo , Lucia Rizzuto , Roberto Passante

We establish a general relation between dispersion forces. First, based on QED in causal media, leading-order perturbation theory is used to express both the single-atom Casimir-Polder and the two-atom van der Waals potentials in terms of…

量子物理 · 物理学 2007-06-12 Stefan Yoshi Buhmann , Hassan Safari , Dirk-Gunnar Welsch , Ho Trung Dung

We derive the complete form of the van der Waals dispersion interaction between two infinitely long anisotropic semiconducting/insulating thin cylinders at all separations. The derivation is based on the general theory of dispersion…

介观与纳米尺度物理 · 物理学 2015-05-13 A. Šiber , R. F. Rajter , R. H. French , W. Y. Ching , V. A. Parsegian , R. Podgornik

While the interaction potential between two dipoles residing in a single plane is repulsive, in a system of two vertically adjacent layers of dipoles it changes from repulsive interaction in the long range to attractive interaction in the…

量子气体 · 物理学 2016-06-29 Kobi Cohen , Maxim Khodas , Boris Laikhtman , Paulo V. Santos , Ronen Rapaport

In some respects, a cluster consisting of many atoms may be regarded as a single large atom. Knowing the dielectric properties of such a cluster permits one to evaluate the form of the van der Waals (dispersion) interactions between two…

软凝聚态物质 · 物理学 2009-11-07 M. M. Calbi , S. M. Gatica , D. Velegol , M. W. Cole

We investigate the resonance dipole-dipole interaction energy between two identical atoms, one in the ground state and the other in the excited state, interacting with the electromagnetic field in the presence of a perfectly reflecting…

量子物理 · 物理学 2018-04-23 Wenting Zhou , Lucia Rizzuto , Roberto Passante

We investigate the dispersive Casimir-Polder interaction between a Rubidium atom and a suspended graphene sheet subjected to an external magnetic field B. We demonstrate that this concrete physical system allows for an unprecedented control…

量子物理 · 物理学 2015-05-12 T. Cysne , W. J. M. Kort-Kamp , D. Oliver , F. A. Pinheiro , F. S. S. Rosa , C. Farina

We study the spatial fluctuations of the Casimir-Polder force experienced by an atom or a small sphere moved above a metallic plate at fixed separation distance. We demonstrate that unlike the mean force, the magnitude of these fluctuations…

We revisit the topic of a dipolar condensate with the recently derived more rigorous pseudo-potential for dipole-dipole interaction [A. Derevianko, Phys. Rev. A {\bf 67}, 033607 (2003)]. Based on the highly successful variational technique,…

超导电性 · 物理学 2009-11-10 S. Yi , L. You

Although repulsive effects have been predicted for quantum vacuum forces between bodies with nontrivial electromagnetic properties, such as between a perfect electric conductor and a perfect magnetic conductor, realistic repulsion seems…

高能物理 - 理论 · 物理学 2012-03-23 Kimball A. Milton , E. K. Abalo , Prachi Parashar , Nima Pourtolami , Iver Brevik , Simen A. Ellingsen

The Lifshitz-type formulas describing the free energy and the force of the van der Waals interaction between an atom (molecule) and a single-wall carbon nanotube are obtained. The single-wall nanotube is considered as a cylindrical sheet…

材料科学 · 物理学 2009-11-13 E. V. Blagov , G. L. Klimchitskaya , V. M. Mostepanenko

I revisit the problem of the interaction between two dissimilar atoms with one atom in an excited state, recently addressed by the authors of Refs.[1-3], and for which precedent approaches have given conflicting results. In the first place,…

量子物理 · 物理学 2016-05-25 Manuel Donaire