dorsal/arxiv
View SchemaComment on "Some implications of the quantum nature of laser fields for quantum computations"
| Authors | W. M. Itano |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0211165 |
| URL | https://arxiv.org/abs/quant-ph/0211165 |
| DOI | 10.1103/PhysRevA.68.046301 |
| Journal | Physical Review A 68, 046301 (2003) |
Abstract
A recent discussion of quantum limitations to the fidelity with which superpositions of internal atomic energy levels can be generated by an applied, quantized, laser pulse is shown to be based on unrealistic physical assumptions. This discussion assumed the validity of Jaynes-Cummings dynamics for an atom interacting with a laser field in free space, that is, when the atom is not surrounded by a resonant cavity. If the laser field is a multimode quantum coherent state, and the Rabi frequency is much greater than the spontaneous decay rate, then the total atomic decoherence rate is on the order of the spontaneous decay rate. With the use of a unitary transformation of the field states due to Mollow, it can be shown that the atomic decoherence rate is the same as if the laser field were treated classically, without any additional contribution due to the quantum nature of the laser field.
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"abstract": "A recent discussion of quantum limitations to the fidelity with which\nsuperpositions of internal atomic energy levels can be generated by an applied,\nquantized, laser pulse is shown to be based on unrealistic physical\nassumptions. This discussion assumed the validity of Jaynes-Cummings dynamics\nfor an atom interacting with a laser field in free space, that is, when the\natom is not surrounded by a resonant cavity. If the laser field is a multimode\nquantum coherent state, and the Rabi frequency is much greater than the\nspontaneous decay rate, then the total atomic decoherence rate is on the order\nof the spontaneous decay rate. With the use of a unitary transformation of the\nfield states due to Mollow, it can be shown that the atomic decoherence rate is\nthe same as if the laser field were treated classically, without any additional\ncontribution due to the quantum nature of the laser field.",
"arxiv_id": "quant-ph/0211165",
"authors": [
"W. M. Itano"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.68.046301",
"journal_ref": "Physical Review A 68, 046301 (2003)",
"title": "Comment on \"Some implications of the quantum nature of laser fields for quantum computations\"",
"url": "https://arxiv.org/abs/quant-ph/0211165"
},
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