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Dynamic localization in quantum dots: analytical theory | | D M Basko
; M A Skvortsov
; V E Kravtsov
; | | Date: |
7 Mar 2003 | | Journal: | Phys Rev Lett, 90 (9), 096801 | | Abstract: | We analyze the response of a complex quantum-mechanical system (e.g., a quantum dot) to a time-dependent perturbation phi(t). Assuming the dot to be described by random-matrix theory for the Gaussian orthogonal ensemble, we find the quantum correction to the energy absorption rate as a function of the dephasing time t(phi). If phi(t) is a sum of d harmonics with incommensurate frequencies, the correction behaves similarly to that for the conductivity deltasigma(d)(t(phi)) in the d-dimensional Anderson model of the orthogonal symmetry class. For a generic periodic perturbation, the leading quantum correction is absent as in the systems of the unitary symmetry class, unless phi(-t+tau)=phi(t+tau) for some tau, which falls into the quasi-1D orthogonal universality class. | | Source: | PubMed, pmid12689247 | | Other source: | [GID 785879] cond-mat/0212032 | | Services: | Forum | Review | Favorites | |
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