dorsal/arxiv
View SchemaAction scales for quantum decoherence and their relation to structures in phase space
| Authors | Daniel Alonso, S. Brouard, Jose P. Palao, R. Sala Mayato |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0309030 |
| URL | https://arxiv.org/abs/quant-ph/0309030 |
| DOI | 10.1103/PhysRevA.69.052111 |
Abstract
A characteristic action $\Delta S$ is defined whose magnitude determines some properties of the expectation value of a general quantum displacement operator. These properties are related to the capability of a given environmental `monitoring' system to induce decoherence in quantum systems coupled to it. We show that the scale for effective decoherence is given by $\Delta S\approx\hbar$. We relate this characteristic action with a complementary quantity, $\Delta Z$, and analyse their connection with the main features of the pattern of structures developed by the environmental state in different phase space representations. The relevance of the $\Delta S$-action scale is illustrated using both a model quantum system solved numerically and a set of model quantum systems for which analytical expressions for the time-averaged expectation value of the displacement operator are obtained explicitly.
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"abstract": "A characteristic action $\\Delta S$ is defined whose magnitude determines some\nproperties of the expectation value of a general quantum displacement operator.\nThese properties are related to the capability of a given environmental\n`monitoring\u0027 system to induce decoherence in quantum systems coupled to it. We\nshow that the scale for effective decoherence is given by $\\Delta\nS\\approx\\hbar$. We relate this characteristic action with a complementary\nquantity, $\\Delta Z$, and analyse their connection with the main features of\nthe pattern of structures developed by the environmental state in different\nphase space representations. The relevance of the $\\Delta S$-action scale is\nillustrated using both a model quantum system solved numerically and a set of\nmodel quantum systems for which analytical expressions for the time-averaged\nexpectation value of the displacement operator are obtained explicitly.",
"arxiv_id": "quant-ph/0309030",
"authors": [
"Daniel Alonso",
"S. Brouard",
"Jose P. Palao",
"R. Sala Mayato"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.69.052111",
"title": "Action scales for quantum decoherence and their relation to structures in phase space",
"url": "https://arxiv.org/abs/quant-ph/0309030"
},
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