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Density Propagator for Many-Body Localization: Finite-Size Effects, Transient Subdiffusion, and Exponential Decay

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Bera, Soumya ; De Tomasi, Giuseppe ; Weiner, Felix ; Evers, Ferdinand
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Date of publication of this fulltext: 20 Mar 2019 12:55


We investigate charge relaxation in quantum wires of spinless disordered fermions (t-V model). Our observable is the time-dependent density propagator Pi(epsilon)(x.t), calculated in windows of different energy density epsilon of the many-body Hamiltonian and at different disorder strengths W, not exceeding the critical value W-c. The width Delta x(epsilon) (t) of Pi(epsilon)(x,t) exhibits a ...


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