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

URN to cite this document:: urn:nbn:de:bvb:355-epub-461159
DOI to cite this document:: 10.5283/epub.46115

Bera, Soumya ; De Tomasi, Giuseppe ; Weiner, Felix ; Evers, Ferdinand

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Date of publication of this fulltext: 25 Jun 2021 04:44

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Abstract

We investigate charge relaxation in quantum wires of spinless disordered fermions (t−V model). Our observable is the time-dependent density propagator Πϵ(x,t), calculated in windows of different energy density ϵ of the many-body Hamiltonian and at different disorder strengths W, not exceeding the critical value Wc. The width Δxϵ(t) of Πϵ(x,t) exhibits a behavior dlnΔxϵ(t)/dlnt=βϵ(t), where the ...