Journal Article

Averaged Semiquantum Method Is a Useful Tool to Predict the Decoherence of Kicked Harmonic Oscillator System

Zhuo Wang and Quan-lin Jie

in Progress of Theoretical Physics

Published on behalf of The Physical Society of Japan

Volume 123, issue 2, pages 199-213
Published in print February 2010 | ISSN: 0033-068X
Published online February 2010 | e-ISSN: 1347-4081 | DOI: https://dx.doi.org/10.1143/PTP.123.199
Averaged Semiquantum Method Is a Useful Tool to Predict the Decoherence of Kicked Harmonic Oscillator System

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We investigate the quantum-classical correspondence of kicked harmonic oscillator (KHO) model by the averaged semiquantum method. Furthermore, we investigate the decoherence of N dimensional kicked harmonic oscillator with different coupling strengths and the dimensionalities. The averaged semiquantum method origins from the time-dependent variational principle (TDVP) formulation and contains nondiagonal matrix elements, so it can be applied to study dissipation, measurement and decoherence problems. When applied to the harmonic oscillator model coupled to a heat bath with different coupling strengths and dimensionalities of the bath, we find that the loss of coherence between superposed wave packets can be also predicted by the averaged semiquantum method.

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Subjects: Quantum Physics ; Classical Mechanics ; Computational Physics

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