dorsal/arxiv
View SchemaTimescales for decoherence and dissipation: reasons for the success of master equations
| Authors | M. O. Terra Cunha, S. Geraij Mokarzel, J. G. Peixoto de Faria, M. C. Nemes |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0409061 |
| URL | https://arxiv.org/abs/quant-ph/0409061 |
Abstract
A perturbative treatment of reduced density operators of quantum subsystems is implemented in the same spirit as Fermi Golden Rule for scattering. Analytic expressions for linear entropy (a measure of purity loss, and in some cases of coherence loss) and for subsystem's energy variations (dissipation) are given. Application to electromagnetic field superposition states in a dissipative cavity is performed. Evaluation of typical field and reservoir time scales ($\tau_{F}$ and $\tau_{R}$) show that even for small temperatures they are very different. We also indicate the condition on the cutoff temperature above which the decoupling assumption is quantitatively justified.
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"abstract": "A perturbative treatment of reduced density operators of quantum subsystems\nis implemented in the same spirit as Fermi Golden Rule for scattering. Analytic\nexpressions for linear entropy (a measure of purity loss, and in some cases of\ncoherence loss) and for subsystem\u0027s energy variations (dissipation) are given.\nApplication to electromagnetic field superposition states in a dissipative\ncavity is performed. Evaluation of typical field and reservoir time scales\n($\\tau_{F}$ and $\\tau_{R}$) show that even for small temperatures they are very\ndifferent. We also indicate the condition on the cutoff temperature above which\nthe decoupling assumption is quantitatively justified.",
"arxiv_id": "quant-ph/0409061",
"authors": [
"M. O. Terra Cunha",
"S. Geraij Mokarzel",
"J. G. Peixoto de Faria",
"M. C. Nemes"
],
"categories": [
"quant-ph"
],
"title": "Timescales for decoherence and dissipation: reasons for the success of master equations",
"url": "https://arxiv.org/abs/quant-ph/0409061"
},
"schema_id": "dorsal/arxiv",
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"variant": "snapshot-2026-03-01",
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