Repulsive vacuum-induced forces on a magnetic particle

Sinha, Kanupriya

doi:10.1103/physreva.97.032513

Cited by 9 publications

(5 citation statements)

References 88 publications

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“…We provide estimations of these forces in the SI. We also comment that recent work has shown a magnetizable particle that can exhibit a Casimir repulsion from a surface. Investigating this repulsion in the scope of a nanoparticle is a matter for future research.…”

Section: Discussionmentioning

confidence: 79%

Optical Magnetic Dipole Levitation Using a Plasmonic Surface

2020

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Optically induced magnetic resonances in nonmagnetic media have unlocked magnetic light−matter interactions and led to new technologies in many research fields. Previous proposals for the levitation of nanoscale particles without structured illumination have worked on the basis of epsilon-near-zero surfaces or anisotropic materials, but these materials carry with them significant fabrication difficulties. We report the optical levitation of a magnetic dipole over a wide range of realistic materials, including bulk metals, thereby relieving these difficulties. The repulsion is independent of surface losses, and we propose an experiment to detect this force which consists of a core−shell nanoparticle, exhibiting a magnetic resonance, in close proximity to a gold substrate under plane wave illumination. We anticipate the use of this phenomenon in new nanomechanical devices.

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Section: Discussionmentioning

confidence: 79%

Optical Magnetic Dipole Levitation Using a Plasmonic Surface

2020

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“…This could allow one to systematically modify the surface properties and drive strength in order to mitigate the surface-induced dissipation and decoherence. As quantum optical systems are being increasingly miniaturized, and mesoscopic quantum components being regularly interfaced with surfaces and waveguides at nanoscales, our results provide new insights into tailoring fluctuation phenomena in these regimes [41][42][43][44].…”

Section: Discussionmentioning

confidence: 90%

Quantum Brownian motion of a particle from Casimir-Polder interactions

Sinha¹,

Subaşı²

2020

Phys. Rev. A

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We study the fluctuation-induced dissipative dynamics of the quantized center of mass motion of a polarizable dielectric particle trapped near a surface. The particle's center of mass is treated as an open quantum system coupled to the electromagnetic field acting as its environment, with the resulting system dynamics described by a quantum Brownian motion master equation. The dissipation and decoherence of the particle's center of mass are characterized by the modified spectral density of the electromagnetic field that depends on surface losses and the strength of the classical trap field. Our results are relevant to experiments with levitated dielectric particles near surfaces, illustrating potential ways of mitigating fluctuation-induced decoherence while preparing such systems in macroscopic quantum states.

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“…[11][12][13], analyze Casimir repulsive forces in magnetodielectric configurations, while the very recent Ref. [14] analyzes the repulsive force on a magnetic point particle near a surface. In general, whether the force is found to be repulsive or attractive, depends on the relative strengths of ε i and µ 1 (i = 1, 2).…”

Section: Introductionmentioning

confidence: 99%

Repulsive Casimir force

Høye

Brevik

2018

Phys. Rev. A

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The Casimir force between two parallel thick plates, one perfectly dielectric, the other purely magnetic, has been calculated long ago by Boyer [T. H. Boyer, Phys. Rev. A 9, 2078(1974]. Its most characteristic property is that it is repulsive. The problem is actually delicate and counterintuitive. In the present paper we analyze the problem by first considering the simple harmonic oscillator model introduced by us earlier [J. S. Høye et al., Phys. Rev. E 67, 056116 (2003); Phys.Rev. A 94, 032113 (2016)]. Extension of this model shows how the repulsive behavior can be understood on a microscopic basis, due to the duality between canonical and mechanical momenta in presence of the electromagnetic vector potential. This duality corresponds to the TM and TE modes in electrodynamics. We analyze the generalized Boyer case where the permittivities and permeabilities of the parallel plates are arbitrary. In this respect we first find the induced interaction between a pair of particles with given electric and magnetic polarizabilities and then find it for a pair of parallel plates. The method used for our evaluations is the statistical mechanical one that we have introduced and applied earlier. Whether the pair of particles or plates attract or repel each other depends on their polarizabilities or permittivities and permeabilities respectively.For equal particles or equal plates there is always attraction.

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Repulsive vacuum-induced forces on a magnetic particle

Cited by 9 publications

References 88 publications

Optical Magnetic Dipole Levitation Using a Plasmonic Surface

Optical Magnetic Dipole Levitation Using a Plasmonic Surface

Quantum Brownian motion of a particle from Casimir-Polder interactions

Repulsive Casimir force

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