Title: Avalanche stability transition in interacting quasiperiodic systems.
Speaker: Mr. Yi-Ting Tu (The University of Maryland, College Park)
Start Date/Time: 2023-01-05 / 13:30 (Taipei time)
End Date/Time: 2023-01-05 / 15:00
Venue: P512, 5F, 3rd General Building, NTHU
Host: Prof. Po-Yao Chang (Department of Physics, NTHU)

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Abstract:
Coupling a 1D quasiperiodic interacting system to a Markovian bath, we study the avalanche instability of the many body localized phase numerically, finding that many body localization (MBL) is more stable in pseudorandom quasiperiodic systems than the corresponding randomly disordered systems for a disorder strength W>8, potentially up to arbitrarily large system sizes. We support our conclusion by additionally developing real space RG arguments, and provide a detailed comparison between quasiperiodic and random MBL from the avalanche instability perspective, concluding that the two belong to different universality classes.