Repulsive Casimir-Lifshitz pressure in closed cavities

• URL: http://arxiv.org/abs/2008.02031v4
• Date: Fri, 22 Jan 2021 10:38:38 GMT
• Title: Repulsive Casimir-Lifshitz pressure in closed cavities
• Authors: C. Romaniega
• Abstract summary: We consider the interaction pressure acting on the surface of a sphere enclosed within a magnetodielectric cavity. We extend the Dzyaloshinskii-Lifshitz-Pitaevskii result for homogeneous slabs. We present configurations in which both the interaction and the self-energy contribution to the pressure tend to expand the sphere.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We consider the interaction pressure acting on the surface of a dielectric sphere enclosed within a magnetodielectric cavity. We determine the sign of this quantity regardless of the geometry of the cavity for systems at thermal equilibrium, extending the Dzyaloshinskii-Lifshitz-Pitaevskii result for homogeneous slabs. As in previous theorems regarding Casimir-Lifshitz forces, the result is based on the scattering formalism. In this case the proof follows from the variable phase approach of electromagnetic scattering. With this, we present configurations in which both the interaction and the self-energy contribution to the pressure tend to expand the sphere.

Related papers

• Derivation of Casimir Effect without Zeta-Regularization [0.0]
  The Casimir effect describes the attractive force arising due to quantum fluctuations of the vacuum electromagnetic field between closely spaced plates. Traditionally, zeta-regularization is employed in calculations to address infinities that emerge during the derivation. This paper presents a novel derivation of the Casimir effect that circumvents the need for zeta-regularization.
  arXiv  Detail & Related papers  (2024-04-12T11:31:00Z)
• Casimir repulsion with biased semiconductors [1.8273673942018027]
  We explore systems involving moderately biased semiconductors that exhibit strong repulsive Casimir forces. Modes emitted from the semiconductors exert a repulsive force on a near surface that overcomes the attractive equilibrium Casimir force contribution at submicron distances. Our work opens up new possibilities of controlling forces at the nano- and micrometer scale with applications in sensing and actuation in nanotechnology.
  arXiv  Detail & Related papers  (2024-03-14T00:04:13Z)
• Casimir Physics beyond the Proximity Force Approximation: The Derivative Expansion [49.1574468325115]
  We review the derivative expansion (DE) method in Casimir physics, an approach which extends the proximity force approximation (PFA) We focus on different particular geometries, boundary conditions, types of fields, and quantum and thermal fluctuations.
  arXiv  Detail & Related papers  (2024-02-27T19:56:52Z)
• Entanglement resolution of free Dirac fermions on a torus [68.8204255655161]
  We first evaluate the SRE for massless Dirac fermions in a system at finite temperature and size. The charge-dependent entropies turn out to be equally distributed among all the symmetry sectors at leading order.
  arXiv  Detail & Related papers  (2022-12-14T14:54:35Z)
• Nonperturbative Casimir effects: Vacuum structure, Confinement, and Chiral Symmetry Breaking [91.3755431537592]
  We consider phase properties of confining gauge theories and strongly interacting fermion systems. In particular, the chiral and deconfinement phase transitions properties in the presence of Casimir plates.
  arXiv  Detail & Related papers  (2022-08-06T07:39:36Z)
• Interplay between optomechanics and the dynamical Casimir effect [55.41644538483948]
  We develop a model of a quantum field confined within a cavity with a movable wall where the position of the wall is quantized. We obtain a full description of the dynamics of both the quantum field and the confining wall depending on the initial state of the whole system.
  arXiv  Detail & Related papers  (2022-04-22T14:27:30Z)
• Casimir effect for magnetic media: Spatially nonlocal response to the off-shell quantum fluctuation [0.0]
  We extend the Lifshitz theory of the Casimir force to the case of two parallel magnetic metal plates. We compute the gradient of the Casimir force between Ni-coated surfaces of a sphere and a plate using the alternative nonlocal response functions.
  arXiv  Detail & Related papers  (2021-10-04T09:50:58Z)
• Casimir-Lifshitz pressure on cavity walls [0.0]
  We study the electromagnetic Casimir-Lifshitz interaction between two bodies when one is contained within the other. We focus on the fluctuation-induced pressure acting on the cavity wall, which is assumed to be spherical. We find that, under general hypotheses, the sign is independent of the geometry of the configuration.
  arXiv  Detail & Related papers  (2021-07-31T06:34:48Z)
• Nonequilibrium Casimir effects of nonreciprocal surface waves [52.12351460454646]
  We show that an isotropic dipolar particle in the vicinity of a substrate made of nonreciprocal plasmonic materials can experience a lateral Casimir force and torque. We connect the existence of the lateral force to the asymmetric dispersion of nonreciprocal surface polaritons and the existence of the lateral torque to the spin-momentum locking of such surface waves.
  arXiv  Detail & Related papers  (2021-06-19T23:10:04Z)
• Feynman diagram approach to dynamical Casimir effect in optimechanical cavity [0.9790236766474201]
  We study an optomechnical system enclosed by an optical cavity with one mirror attached to a spring as a closed quantum system. We provide a different angle of studying the phenomenons related to the dynamical Casimir effect via Feynman diagram technique.
  arXiv  Detail & Related papers  (2021-03-19T06:49:18Z)
• Enhanced decoherence for a neutral particle sliding on a metallic surface in vacuum [68.8204255655161]
  We show that non-contact friction enhances the decoherence of the moving atom. We suggest that measuring decoherence times through velocity dependence of coherences could indirectly demonstrate the existence of quantum friction.
  arXiv  Detail & Related papers  (2020-11-06T17:34:35Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.