dorsal/arxiv
View SchemaAtoms near magnetodielectric bodies: van-der-Waals energy and Casimir-Polder force
| Authors | S. Y. Buhmann, Ho Trung Dung, T. Kampf, L. Knöll, D. -G. Welsch |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0406221 |
| URL | https://arxiv.org/abs/quant-ph/0406221 |
| DOI | 10.1134/1.2055945 |
| Journal | Optics and Spectroscopy (USSR) 99 (3), 466 (2005) |
Abstract
Based on macroscopic QED in linear, causal media, we present a consistent theory for the Casimir-Polder force acting on an atom positioned near dispersing and absorbing magnetodielectric bodies. The perturbative result for the van-der-Waals energy is shown to exhibit interesting new features in the presence of magnetodielectric bodies. To go beyond perturbation theory, we start with the center-of-mass equation of motion and derive a dynamical expression for the Casimir-Polder force acting on an atom prepared in an arbitrary electronic state. For a non-driven atom in the weak coupling regime, the force as a function of time is shown to be a superposition of force components that are related to the electronic density matrix elements at chosen time. These force components depend on the position-dependent polarizability of the atom that correctly accounts for the body-induced level shifts and broadenings.
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"abstract": "Based on macroscopic QED in linear, causal media, we present a consistent\ntheory for the Casimir-Polder force acting on an atom positioned near\ndispersing and absorbing magnetodielectric bodies. The perturbative result for\nthe van-der-Waals energy is shown to exhibit interesting new features in the\npresence of magnetodielectric bodies. To go beyond perturbation theory, we\nstart with the center-of-mass equation of motion and derive a dynamical\nexpression for the Casimir-Polder force acting on an atom prepared in an\narbitrary electronic state. For a non-driven atom in the weak coupling regime,\nthe force as a function of time is shown to be a superposition of force\ncomponents that are related to the electronic density matrix elements at chosen\ntime. These force components depend on the position-dependent polarizability of\nthe atom that correctly accounts for the body-induced level shifts and\nbroadenings.",
"arxiv_id": "quant-ph/0406221",
"authors": [
"S. Y. Buhmann",
"Ho Trung Dung",
"T. Kampf",
"L. Kn\u00f6ll",
"D. -G. Welsch"
],
"categories": [
"quant-ph"
],
"doi": "10.1134/1.2055945",
"journal_ref": "Optics and Spectroscopy (USSR) 99 (3), 466 (2005)",
"title": "Atoms near magnetodielectric bodies: van-der-Waals energy and Casimir-Polder force",
"url": "https://arxiv.org/abs/quant-ph/0406221"
},
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