dorsal/arxiv
View SchemaPreparation and control of a cavity-field state through atom-driven field interaction: towards long-lived mesoscopic states
| Authors | C. J. Villas-Boas, F. R. de Paula, R. M. Serra, M. H. Y. Moussa |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307096 |
| URL | https://arxiv.org/abs/quant-ph/0307096 |
| DOI | 10.1103/PhysRevA.68.053808 |
| Journal | Phys. Rev. A 68, 053808 (2003) |
Abstract
The preparation of mesoscopic states of the radiation and matter fields through atom-field interactions has been achieved in recent years and employed for a range of striking applications in quantum optics. Here we present a technique for the preparation and control of a cavity mode which, besides interacting with a two-level atom, is simultaneously submitted to linear and parametric amplification processes. The role of the amplification-controlling fields in the achievement of real mesoscopic states, is to produce highly-squeezed field states and, consequently, to increase both: i) the distance in phase space between the components of the prepared superpositions and ii) the mean photon number of such superpositions. When submitting the squeezed superposition states to the action of similarly squeezed reservoirs, we demonstrate that under specific conditions the decoherence time of the states becomes independent of both the distance in phase space between their components and their mean photon number. An explanation is presented to support this remarkable result, together with a discussion on the experimental implementation of our proposal. We also show how to produce number states with fidelities higher than those derived as circular states.
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"abstract": "The preparation of mesoscopic states of the radiation and matter fields\nthrough atom-field interactions has been achieved in recent years and employed\nfor a range of striking applications in quantum optics. Here we present a\ntechnique for the preparation and control of a cavity mode which, besides\ninteracting with a two-level atom, is simultaneously submitted to linear and\nparametric amplification processes. The role of the amplification-controlling\nfields in the achievement of real mesoscopic states, is to produce\nhighly-squeezed field states and, consequently, to increase both: i) the\ndistance in phase space between the components of the prepared superpositions\nand ii) the mean photon number of such superpositions. When submitting the\nsqueezed superposition states to the action of similarly squeezed reservoirs,\nwe demonstrate that under specific conditions the decoherence time of the\nstates becomes independent of both the distance in phase space between their\ncomponents and their mean photon number. An explanation is presented to support\nthis remarkable result, together with a discussion on the experimental\nimplementation of our proposal. We also show how to produce number states with\nfidelities higher than those derived as circular states.",
"arxiv_id": "quant-ph/0307096",
"authors": [
"C. J. Villas-Boas",
"F. R. de Paula",
"R. M. Serra",
"M. H. Y. Moussa"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.68.053808",
"journal_ref": "Phys. Rev. A 68, 053808 (2003)",
"title": "Preparation and control of a cavity-field state through atom-driven field interaction: towards long-lived mesoscopic states",
"url": "https://arxiv.org/abs/quant-ph/0307096"
},
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