dorsal/arxiv
View SchemaQuantum correlations of an atomic ensemble via a classical bath
| Authors | M. Macovei, J. Evers, C. H. Keitel |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0507245 |
| URL | https://arxiv.org/abs/quant-ph/0507245 |
| DOI | 10.1103/PhysRevA.72.063809 |
| Journal | Phys. Rev. A 72, 063809 (2005) |
Abstract
Somewhat surprisingly, quantum features can be extracted from a classical bath. For this, we discuss a sample of three-level atoms in ladder configuration interacting only via the surrounding bath, and show that the fluorescence light emitted by this system exhibits non-classical properties. Typical realizations for such an environment are thermal baths for microwave transition frequencies, or incoherent broadband fields for optical transitions. In a small sample of atoms, the emitted light can be switched from sub- to super-poissonian and from anti-bunching to super-bunching controlled by the mean number of atoms in the sample. Larger samples allow to generate super-bunched light over a wide range of bath parameters and thus fluorescence light intensities. We also identify parameter ranges where the fields emitted on the two transitions are correlated or anti-correlated, such that the Cauchy-Schwarz inequality is violated. As in a moderately strong baths this violation occurs also for larger numbers of atoms, such samples exhibit mesoscopic quantum effects.
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"abstract": "Somewhat surprisingly, quantum features can be extracted from a classical\nbath. For this, we discuss a sample of three-level atoms in ladder\nconfiguration interacting only via the surrounding bath, and show that the\nfluorescence light emitted by this system exhibits non-classical properties.\nTypical realizations for such an environment are thermal baths for microwave\ntransition frequencies, or incoherent broadband fields for optical transitions.\nIn a small sample of atoms, the emitted light can be switched from sub- to\nsuper-poissonian and from anti-bunching to super-bunching controlled by the\nmean number of atoms in the sample. Larger samples allow to generate\nsuper-bunched light over a wide range of bath parameters and thus fluorescence\nlight intensities. We also identify parameter ranges where the fields emitted\non the two transitions are correlated or anti-correlated, such that the\nCauchy-Schwarz inequality is violated. As in a moderately strong baths this\nviolation occurs also for larger numbers of atoms, such samples exhibit\nmesoscopic quantum effects.",
"arxiv_id": "quant-ph/0507245",
"authors": [
"M. Macovei",
"J. Evers",
"C. H. Keitel"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.063809",
"journal_ref": "Phys. Rev. A 72, 063809 (2005)",
"title": "Quantum correlations of an atomic ensemble via a classical bath",
"url": "https://arxiv.org/abs/quant-ph/0507245"
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