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Wave-Turbulence Origin of the Instability of Anderson Localization against Many-Body Interactions
Zhen Wang1, Weicheng Fu1, Yong Zhang1
1Department of Physics, Xiamen University, Xiamen 361005, Fujian, China.
Abstract:
Whether Anderson localization is robust against many-body interactions and, closely related, whether a disordered many-body system can be thermalized are long outstanding issues. In this Letter, we address these issues with the wave-turbulence theory. We show that, in general, the thermalization time in one-dimensional disordered lattice systems is inversely proportional to the squared interaction strength in the thermodynamic limit. It leads to the conclusion that such systems can always be thermalized by arbitrarily weak many-body interactions and thus the localized states are unstable.
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