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- W1977231808 abstract "Effect of dynamical perturbation on quantum localization phenomenon in one-dimensional disordered quantum system is investigated systematically by a numerical method. The dynamical perturbation is modeled by an oscillatory driving force containing M-independent (mutually incommensurate) frequency components. For M⩾2 a diffusive behavior emerges and the presence of finite localization length can no longer be detected numerically. The diffusive motion obeys a subdiffusion law characterized by the exponent α as ξ(t)2∝tα, where ξ(t)2 is the mean square displacement of the wave packet. With increase in M and/or the perturbation strength, the exponent α approaches rapidly to 1 which corresponds to the normal-diffusion. Moreover, the space(x)-time(t) dependence of the distribution function P(x,t) is reduced to a scaled form decided by α and an another exponent β such that , which contains the two extreme limits, i.e., the localization limit (α=0,β=1) and the normal-diffusion limit (α=1,β=2) in a unified manner." @default.
- W1977231808 created "2016-06-24" @default.
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- W1977231808 creator A5057022973 @default.
- W1977231808 date "1999-03-01" @default.
- W1977231808 modified "2023-10-14" @default.
- W1977231808 title "Dynamical delocalization of one-dimensional disordered system with lattice vibration" @default.
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- W1977231808 doi "https://doi.org/10.1016/s0921-4526(98)01321-0" @default.
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