Semiclassical calculation of the vibrational echo

W. G. Noid; Gregory S. Ezra; Roger F. Loring

doi:10.1063/1.1633550

Semiclassical calculation of the vibrational echo

W. G. Noid, Gregory S. Ezra, Roger F. Loring

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32 Scopus citations

Abstract

For a thermal distribution of noninteracting anharmonic oscillators, the quantum echo response function differs from the classical mechanical limit in exhibiting recurrences and in the existence of a quantum mechanical frequency shift. Both of these effects are reproduced by the semiclassical approach. In a large system with dissipation, effectively irreversible dephasing processes can obscure the differences between classical and quantum calculations.

Original language	English (US)
Pages (from-to)	1491-1499
Number of pages	9
Journal	Journal of Chemical Physics
Volume	120
Issue number	3
DOIs	https://doi.org/10.1063/1.1633550
State	Published - Jan 15 2004

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.1633550

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abstract = "For a thermal distribution of noninteracting anharmonic oscillators, the quantum echo response function differs from the classical mechanical limit in exhibiting recurrences and in the existence of a quantum mechanical frequency shift. Both of these effects are reproduced by the semiclassical approach. In a large system with dissipation, effectively irreversible dephasing processes can obscure the differences between classical and quantum calculations.",

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AB - For a thermal distribution of noninteracting anharmonic oscillators, the quantum echo response function differs from the classical mechanical limit in exhibiting recurrences and in the existence of a quantum mechanical frequency shift. Both of these effects are reproduced by the semiclassical approach. In a large system with dissipation, effectively irreversible dephasing processes can obscure the differences between classical and quantum calculations.

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Semiclassical calculation of the vibrational echo

Abstract

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