dorsal/arxiv
View SchemaRobust generation of entanglement in Bose-Einstein condensates by collective atomic recoil
| Authors | Mary M. Cola, Matteo G. A. Paris, Nicola Piovella |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0404109 |
| URL | https://arxiv.org/abs/quant-ph/0404109 |
| DOI | 10.1103/PhysRevA.70.043809 |
| Journal | Phys. Rev. A vol 70, 043809 (2004). |
Abstract
We address the dynamics induced by collective atomic recoil in a Bose-Einstein condensate in presence of radiation losses and atomic decoherence. In particular, we focus on the linear regime of the lasing mechanism, and analyze the effects of losses and decoherence on the generation of entanglement. The dynamics is that of three bosons, two atomic modes interacting with a single-mode radiation field, coupled with a bath of oscillators. The resulting three-mode dissipative Master equation is solved analytically in terms of the Wigner function. We examine in details the two complementary limits of {\em high-Q cavity} and {\em bad-cavity}, the latter corresponding to the so-called superradiant regime, both in the quasi-classical and quantum regimes. We found that three-mode entanglement as well as two-mode atom-atom and atom-radiation entanglement is generally robust against losses and decoherence,thus making the present system a good candidate for the experimental observation of entanglement in condensate systems. In particular, steady-state entanglement may be obtained both between atoms with opposite momenta and between atoms and photons.
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"abstract": "We address the dynamics induced by collective atomic recoil in a\nBose-Einstein condensate in presence of radiation losses and atomic\ndecoherence. In particular, we focus on the linear regime of the lasing\nmechanism, and analyze the effects of losses and decoherence on the generation\nof entanglement. The dynamics is that of three bosons, two atomic modes\ninteracting with a single-mode radiation field, coupled with a bath of\noscillators. The resulting three-mode dissipative Master equation is solved\nanalytically in terms of the Wigner function. We examine in details the two\ncomplementary limits of {\\em high-Q cavity} and {\\em bad-cavity}, the latter\ncorresponding to the so-called superradiant regime, both in the quasi-classical\nand quantum regimes. We found that three-mode entanglement as well as two-mode\natom-atom and atom-radiation entanglement is generally robust against losses\nand decoherence,thus making the present system a good candidate for the\nexperimental observation of entanglement in condensate systems. In particular,\nsteady-state entanglement may be obtained both between atoms with opposite\nmomenta and between atoms and photons.",
"arxiv_id": "quant-ph/0404109",
"authors": [
"Mary M. Cola",
"Matteo G. A. Paris",
"Nicola Piovella"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.043809",
"journal_ref": "Phys. Rev. A vol 70, 043809 (2004).",
"title": "Robust generation of entanglement in Bose-Einstein condensates by collective atomic recoil",
"url": "https://arxiv.org/abs/quant-ph/0404109"
},
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