dorsal/arxiv
View SchemaThree-dimensional theory for interaction between atomic ensembles and free-space light
| Authors | L. -M. Duan, J. I. Cirac, P. Zoller |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0205005 |
| URL | https://arxiv.org/abs/quant-ph/0205005 |
| DOI | 10.1103/PhysRevA.66.023818 |
| Journal | Phys. Rev. A 66, 023818 (2002). |
Abstract
Atomic ensembles have shown to be a promising candidate for implementations of quantum information processing by many recently-discovered schemes. All these schemes are based on the interaction between optical beams and atomic ensembles. For description of these interactions, one assumed either a cavity-QED model or a one-dimensional light propagation model, which is still inadequate for a full prediction and understanding of most of the current experimental efforts which are actually taken in the three-dimensional free space. Here, we propose a perturbative theory to describe the three-dimensional effects in interaction between atomic ensembles and free-space light with a level configuration important for several applications. The calculations reveal some significant effects which are not known before from the other approaches, such as the inherent mode-mismatching noise and the optimal mode-matching conditions. The three-dimensional theory confirms the collective enhancement of the signal-to-noise ratio which is believed to be one of the main advantage of the ensemble-based quantum information processing schemes, however, it also shows that this enhancement need to be understood in a more subtle way with an appropriate mode matching method.
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"abstract": "Atomic ensembles have shown to be a promising candidate for implementations\nof quantum information processing by many recently-discovered schemes. All\nthese schemes are based on the interaction between optical beams and atomic\nensembles. For description of these interactions, one assumed either a\ncavity-QED model or a one-dimensional light propagation model, which is still\ninadequate for a full prediction and understanding of most of the current\nexperimental efforts which are actually taken in the three-dimensional free\nspace. Here, we propose a perturbative theory to describe the three-dimensional\neffects in interaction between atomic ensembles and free-space light with a\nlevel configuration important for several applications. The calculations reveal\nsome significant effects which are not known before from the other approaches,\nsuch as the inherent mode-mismatching noise and the optimal mode-matching\nconditions. The three-dimensional theory confirms the collective enhancement of\nthe signal-to-noise ratio which is believed to be one of the main advantage of\nthe ensemble-based quantum information processing schemes, however, it also\nshows that this enhancement need to be understood in a more subtle way with an\nappropriate mode matching method.",
"arxiv_id": "quant-ph/0205005",
"authors": [
"L. -M. Duan",
"J. I. Cirac",
"P. Zoller"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.66.023818",
"journal_ref": "Phys. Rev. A 66, 023818 (2002).",
"title": "Three-dimensional theory for interaction between atomic ensembles and free-space light",
"url": "https://arxiv.org/abs/quant-ph/0205005"
},
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