Journal
PHYSICAL REVIEW B
Volume 102, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.102.094201
Keywords
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Funding
- Fundamental Research Funds for the Central Universities [3102017OQD074, 310201911cx044]
- R&D Convergence Program of NST (National Research Council of Science and Technology)
- Ministry of Science, ICT & Future Planning, Gyeongsangbuk-do and Pohang City [CAP-15-08-KRISS]
- DST [PH2021039DSTX008128]
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Nonequilibrium dynamics in isolated quantum many-body systems displays a number of intriguing features, such as many-body localization (MBL) and prethermalization. Here we investigate a simple ladder system with disorder, in which various distinct dynamical features coexist and interplay. By exact diagonalization, we demonstrate that the system exhibits the signatures of an MBL-ergodic-MBL reentrant transition, metastability, and disorder-free MBL. We give an account of these properties by introducing a quasiparticle picture and interpreting the quasivacuum energy fluctuation as an effective disorder on the quasi-particle dynamics. It is speculated that the weak perturbation behavior is a finite-size effect, but its relaxation timescale increases with the system size.
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