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Dynamic behaviours of an exciton confined in coupled quantum dots driven by a hi gh alternating current electrical field

Liu Cheng-Shi Ma Ben-Kun

Dynamic behaviours of an exciton confined in coupled quantum dots driven by a hi gh alternating current electrical field

Liu Cheng-Shi, Ma Ben-Kun
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Publishing process
  • Received Date:  23 October 2002
  • Accepted Date:  08 January 2003
  • Published Online:  05 April 2003

Dynamic behaviours of an exciton confined in coupled quantum dots driven by a hi gh alternating current electrical field

  • 1. 北京师范大学物理系,北京 100875

Abstract: With the three-site Hubbard model and Floquet theorem, we investigate the dynamic behaviours of an exciton confined in three-quantum-dots molecules driven by an alternating current electrical field. The calculations show that the initia l localized state is hold up for a certain value of strength and frequency of th e alternating current field. In order to understand the dynamical property, we a pply the perturbation theory to solve the Floquet function and obtain the analyt ical solution of quasi-energy. We find that the dynamical localization can be bu ilt at the crossing point of quasi-energies for strong and moderate fields.

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