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110586 |
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|a Combescot, Monique
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|a Massachusetts Institute of Technology. Department of Chemistry
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|a Chenu, Aurelia
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|a Chenu, Aurelia
|e author
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|a Many-body formalism for thermally excited wave packets: A way to connect the quantum regime to the classical regime
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|b American Physical Society,
|c 2017-07-10T15:27:42Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/110586
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|a Free classical particles have well-defined momentum and position, while free quantum particles have well-defined momentum but a position fully delocalized over the sample volume. We develop a many-body formalism based on wave-packet operators that connects these two limits, the thermal energy being distributed between the state spatial extension and its thermal excitation. The corresponding mixed quantum-classical states, which render the Boltzmann operator diagonal, are the physically relevant states when the temperature is finite. The formulation of many-body Hamiltonians in terms of these thermally excited wave packets and the resulting effective scatterings is provided.
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|a Swiss National Science Foundation
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|a en
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|a Article
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|t Physical Review A
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