Analytically Solvable Renormalization Group for the Many-Body Localization Transition
Journal Article
·
· Physical Review Letters
- Univ. of Geneva (Switzerland); Inst. of Science and Technology Austria, Klosterneuburg (Austria); UMass Amherst
- Univ. of Massachusetts, Amherst, MA (United States)
- Inst. of Science and Technology Austria, Klosterneuburg (Austria)
We introduce a simple, exactly solvable strong-randomness renormalization group (RG) model for the many-body localization (MBL) transition in one dimension. Our approach relies on a family of RG flows parametrized by the asymmetry between thermal and localized phases. We identify the physical MBL transition in the limit of maximal asymmetry, reflecting the instability of MBL against rare thermal inclusions. We find a critical point that is localized with power-law distributed thermal inclusions. The typical size of critical inclusions remains finite at the transition, while the average size is logarithmically diverging. We propose a two-parameter scaling theory for the many-body localization transition that falls into the Kosterlitz-Thouless universality class, with the MBL phase corresponding to a stable line of fixed points with multifractal behavior.
- Research Organization:
- Univ. of Massachusetts, Amherst, MA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0019168
- OSTI ID:
- 1509473
- Alternate ID(s):
- OSTI ID: 1492475
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 122; ISSN 0031-9007; ISSN PRLTAO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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