We study the many-body localization (MBL) properties of a chain of interacting fermions subject to a quasiperiodic potential such that the non-interacting chain is always delocalized and displays multifractality. Contrary to naive expectations, adding interactions in this systems does not enhance delocalization, and a MBL transition is observed. Due to the local properties of the quasiperiodic potential, the MBL phase presents specific features, such as additional peaks in the density distribution. We furthermore investigate the fate of multifractality in the ergodic phase for low potential values. Our analysis is based on exact numerical studies of eigenstates and dynamical properties after a quench.
Cited by 2
Vipin Kerala Varma et al., Diffusive transport in a quasiperiodic Fibonacci chain: Absence of many-body localization at weak interactions
Phys. Rev. B 100, 085105 (2019) [Crossref]
Elmer V. H. Doggen et al., Many-body delocalization dynamics in long Aubry-André quasiperiodic chains
Phys. Rev. B 100, 104203 (2019) [Crossref]
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- Agence Nationale de la Recherche [ANR]
- Grand Équipement National De Calcul Intensif (through Organization: Grand Equipement National de Calcul Intensif [GENCI])
- Partnership for Advanced Computing in Europe AISBL (PRACE) (through Organization: Partnership for Advanced Computing in Europe [PRACE])