dorsal/arxiv
View SchemaLong-lived Quantum Coherence between Macroscopically Distinct States in Superradiance
| Authors | Daniel Braun, Petr A. Braun, Fritz Haake |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9903040 |
| URL | https://arxiv.org/abs/quant-ph/9903040 |
| DOI | 10.1016/S0030-4018(99)00480-0 |
| Journal | Opt. Comm. {\bf 179}, 195 (2000) |
Abstract
The dephasing influence of a dissipative environment reduces linear superpositions of macroscopically distinct quantum states (sometimes also called Schr\"odinger cat states) usually almost immediately to a statistical mixture. This process is called decoherence. Couplings to the environment with a certain symmetry can lead to slow decoherence. In this Letter we show that the collective coupling of a large number of two-level atoms to an electromagnetic field mode in a cavity that leads to the phenomena of superradiance has such a symmetry, at least approximately. We construct superpositions of macroscopically distinct quantum states decohering only on a classical time scale and propose an experiment in which the extraordinarily slow decoherence should be observable.
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"abstract": "The dephasing influence of a dissipative environment reduces linear\nsuperpositions of macroscopically distinct quantum states (sometimes also\ncalled Schr\\\"odinger cat states) usually almost immediately to a statistical\nmixture. This process is called decoherence. Couplings to the environment with\na certain symmetry can lead to slow decoherence. In this Letter we show that\nthe collective coupling of a large number of two-level atoms to an\nelectromagnetic field mode in a cavity that leads to the phenomena of\nsuperradiance has such a symmetry, at least approximately. We construct\nsuperpositions of macroscopically distinct quantum states decohering only on a\nclassical time scale and propose an experiment in which the extraordinarily\nslow decoherence should be observable.",
"arxiv_id": "quant-ph/9903040",
"authors": [
"Daniel Braun",
"Petr A. Braun",
"Fritz Haake"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall",
"physics.optics"
],
"doi": "10.1016/S0030-4018(99)00480-0",
"journal_ref": "Opt. Comm. {\\bf 179}, 195 (2000)",
"title": "Long-lived Quantum Coherence between Macroscopically Distinct States in Superradiance",
"url": "https://arxiv.org/abs/quant-ph/9903040"
},
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