dorsal/arxiv
View SchemaCasimir-Polder interaction between an excited atom and a gas dielectric medium
| Authors | Yury Sherkunov |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0606135 |
| URL | https://arxiv.org/abs/quant-ph/0606135 |
| DOI | 10.1103/PhysRevA.75.012705 |
| Journal | PhysRevA 75, 012705 (2007) |
Abstract
The Casimir-Polder potential for interaction between an excited atom and a ground-state one in the retarded case obtained with the help of perturbation technique drops as R^-2 with the distance between the atoms [E.A. Power, T.Thirunamachandran, Phys. Rev. A, 47, 2539 (1993)]. It results in diverdent integrals for interaction between an excited atom and a dilute gas medium. We investigate interaction between two atoms embedded in a dielectric medium with the help of non-perturbative approach. We take into account absorption of photons in the medium. This approach solves the problem of divergence. We consider interaction between an excited atom and a planar dielectric gas medium of ground-state atoms. We show that the retarded interaction between an excited atom and a gas of ground-state atoms is not oscillating but follows a simple power law. We show that to obtain coventional non-retarded expression for the van der Waals force between an excited atom and a dilute gas the distance between the atom and the interface should be much smaller than the free mean pass of a photon in the medium. Interaction between an excited atom and a hemisphere of ground-state atoms is considered.
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"abstract": "The Casimir-Polder potential for interaction between an excited atom and a\nground-state one in the retarded case obtained with the help of perturbation\ntechnique drops as R^-2 with the distance between the atoms [E.A. Power,\nT.Thirunamachandran, Phys. Rev. A, 47, 2539 (1993)]. It results in diverdent\nintegrals for interaction between an excited atom and a dilute gas medium. We\ninvestigate interaction between two atoms embedded in a dielectric medium with\nthe help of non-perturbative approach. We take into account absorption of\nphotons in the medium. This approach solves the problem of divergence. We\nconsider interaction between an excited atom and a planar dielectric gas medium\nof ground-state atoms. We show that the retarded interaction between an excited\natom and a gas of ground-state atoms is not oscillating but follows a simple\npower law. We show that to obtain coventional non-retarded expression for the\nvan der Waals force between an excited atom and a dilute gas the distance\nbetween the atom and the interface should be much smaller than the free mean\npass of a photon in the medium. Interaction between an excited atom and a\nhemisphere of ground-state atoms is considered.",
"arxiv_id": "quant-ph/0606135",
"authors": [
"Yury Sherkunov"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.012705",
"journal_ref": "PhysRevA 75, 012705 (2007)",
"title": "Casimir-Polder interaction between an excited atom and a gas dielectric medium",
"url": "https://arxiv.org/abs/quant-ph/0606135"
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