Coherent Dynamics of Direct-Current-Driven Quantum-Dot-Array with Two Time-Dependent Embedded Impurities |
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| Authors: | LI Xiu-Ping LA Shi-Jiang WEN Yu-Bing YAN Wei-Xian |
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| Affiliation: | Department of Physics, Shanxi University, Taiyuan 030006 |
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| Abstract: | The coherent dynamics of dc-driven quantum-dot array with two embedded time-dependent impurities is investigated, the exact crossings and avoided crossings in the quasienergies are associated with the evolution dynamics of the electron by the introduction of the envelope lines of the site's maximum returning probability. Through a perturbative scheme, the time-dependent Hamiltonian is replaced by an equivalent static one, whose structure reveals the new quantum tunnelling mechanism in the time-periodic driving system and sheds light on the alternative interpretation of dynamic localization and delocalization. |
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| Keywords: | 66.35.+a 72.20.Ee 72.10.Fk |
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