dorsal/arxiv
View SchemaDecoherence of molecular wave packets in an anharmonic potential
| Authors | Peter Foldi, Mihaly G. Benedict, Attila Czirjak, Balazs Molnar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0208141 |
| URL | https://arxiv.org/abs/quant-ph/0208141 |
| DOI | 10.1103/PhysRevA.67.032104 |
Abstract
The time evolution of anharmonic molecular wave packets is investigated under the influence of the environment consisting of harmonic oscillators. These oscillators represent photon or phonon modes and assumed to be in thermal equilibrium. Our model explicitly incorporates the fact that in the case of a nonequidistant spectrum the rates of the environment induced transitions are different for each transition. The nonunitary time evolution is visualized by the aid of the Wigner function related to the vibrational state of the molecule. The time scale of decoherence is much shorter than that of dissipation, and gives rise to states which are mixtures of localized states along the phase space orbit of the corresponding classical particle. This behavior is to a large extent independent of the coupling strength, the temperature of the environment and also of the initial state.
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"abstract": "The time evolution of anharmonic molecular wave packets is investigated under\nthe influence of the environment consisting of harmonic oscillators. These\noscillators represent photon or phonon modes and assumed to be in thermal\nequilibrium. Our model explicitly incorporates the fact that in the case of a\nnonequidistant spectrum the rates of the environment induced transitions are\ndifferent for each transition. The nonunitary time evolution is visualized by\nthe aid of the Wigner function related to the vibrational state of the\nmolecule. The time scale of decoherence is much shorter than that of\ndissipation, and gives rise to states which are mixtures of localized states\nalong the phase space orbit of the corresponding classical particle. This\nbehavior is to a large extent independent of the coupling strength, the\ntemperature of the environment and also of the initial state.",
"arxiv_id": "quant-ph/0208141",
"authors": [
"Peter Foldi",
"Mihaly G. Benedict",
"Attila Czirjak",
"Balazs Molnar"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.67.032104",
"title": "Decoherence of molecular wave packets in an anharmonic potential",
"url": "https://arxiv.org/abs/quant-ph/0208141"
},
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