Dynamics of Optically Driven Exciton and Quantum Decoherence

By using the normal ordering method,we study the state evolution of an optically driven excitons in a quantum well immersed in a leaky cavity,which was introduced by Yu-Xi Liu et al.(Phys.Rev.A63(2001)033816).The influence of the external laser field on the quantum decoherence of a mesoscopically su...

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Bibliographic Details
Published in:Communications in theoretical physics 2003-06, Vol.39 (6), p.723-728, Article 723
Main Author: JINGuang-Ri LIUYu-Xi ZHOUDuan-Lu SUNChang-Pu
Format: Article
Language:English
Subjects:
Schrodinger
光动力学
薛定谔方程
量子力学
量子脱散
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Summary:By using the normal ordering method,we study the state evolution of an optically driven excitons in a quantum well immersed in a leaky cavity,which was introduced by Yu-Xi Liu et al.(Phys.Rev.A63(2001)033816).The influence of the external laser field on the quantum decoherence of a mesoscopically superposed state of the excitons is investigated.Our result shows that,the classical field can compensate the energy dissipation of the excitons.Although the decoherence rate of the excitonic Schroedinger cat state does not depend on the external filed.the phase of the decoherence factor can be well controlled by adjusting the amplitude of the external field as well as the detunging betwenn the field and the transition frequency of the atom.
ISSN:0253-6102
DOI:10.1088/0253-6102/39/6/723