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Mardi 26 mai, 2020 - 14:00

Slow many-body delocalization beyond one dimension

Elmer Doggen (IQMT Karlsruhe) - en visio

par Revaz Ramazashvili - 26 mai 2020

We study the delocalization dynamics of interacting disordered hard-core bosons for quasi-1D and 2D geometries, with system sizes and time scales comparable to state-of-the-art experiments. The results are strikingly similar to the 1D case, with slow, subdiffusive dynamics featuring power-law decay. From the freezing of this decay we infer the critical disorder Wc(L,d) as a function of length L and width d. In the quasi-1D case Wc has a finite large-L limit at fixed d, which increases strongly with d. In the 2D case Wc(L,L) grows with L. The results are consistent with the avalanche picture of the many-body localization transition.

Post-scriptum :

contact : G. Lemarié