dorsal/arxiv
View SchemaPhase diffusion pattern in quantum nondemolition systems
| Authors | Subhashish Banerjee, Joyee Ghosh, R. Ghosh |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0703055 |
| URL | https://arxiv.org/abs/quant-ph/0703055 |
| DOI | 10.1103/PhysRevA.75.062106 |
| Journal | Phys. Rev. A 75, 062106 (2007) |
Abstract
We quantitatively analyze the dynamics of the quantum phase distribution associated with the reduced density matrix of a system, as the system evolves under the influence of its environment with an energy-preserving quantum nondemolition (QND) type of coupling. We take the system to be either an oscillator (harmonic or anharmonic) or a two-level atom (or equivalently, a spin-1/2 system), and model the environment as a bath of harmonic oscillators, initially in a general squeezed thermal state. The impact of the different environmental parameters is explicitly brought out as the system starts out in various initial states. The results are applicable to a variety of physical systems now studied experimentally with QND measurements.
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"abstract": "We quantitatively analyze the dynamics of the quantum phase distribution\nassociated with the reduced density matrix of a system, as the system evolves\nunder the influence of its environment with an energy-preserving quantum\nnondemolition (QND) type of coupling. We take the system to be either an\noscillator (harmonic or anharmonic) or a two-level atom (or equivalently, a\nspin-1/2 system), and model the environment as a bath of harmonic oscillators,\ninitially in a general squeezed thermal state. The impact of the different\nenvironmental parameters is explicitly brought out as the system starts out in\nvarious initial states. The results are applicable to a variety of physical\nsystems now studied experimentally with QND measurements.",
"arxiv_id": "quant-ph/0703055",
"authors": [
"Subhashish Banerjee",
"Joyee Ghosh",
"R. Ghosh"
],
"categories": [
"quant-ph",
"cond-mat.stat-mech"
],
"doi": "10.1103/PhysRevA.75.062106",
"journal_ref": "Phys. Rev. A 75, 062106 (2007)",
"title": "Phase diffusion pattern in quantum nondemolition systems",
"url": "https://arxiv.org/abs/quant-ph/0703055"
},
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