Online: Seminar, John Imbrie (University of Virginia), Many-Body Localization near the Critical Point


Tuesday, February 9, 2021, 10:00am



John Imbrie

Location: Zoom

Time: Tuesday, February 9, 2021, 10:00 AM (Eastern US), 15:00 (UK/Eire), 16:00 (Central Europe), 23:00 (China)

Title: Many-Body Localization near the Critical Point

Abstract: I will examine the many-body localization (MBL) phase transition in one-dimensional quantum systems with quenched randomness. Having demonstrated the existence of the MBL phase at strong disorder, under a level-statistics assumption, I will focus on the nature of the transition out of this phase, using an approximate strong-disorder renormalization group. In this approach, the phase transition is due to the so-called avalanche instability of the MBL phase. I show that the critical behavior can be determined analytically within this RG. The RG flow near the critical fixed point is qualitatively similar to the Kosterlitz-Thouless (KT) flow, but there are important differences, and so this MBL transition is in a universality class that is distinct from KT. The divergence of the correlation length corresponds to critical exponent ν →∞, but the divergence is weaker than for the KT transition. This is joint work with Alan Morningstar and David Huse. 

Additional Ways to Join
Join by telephone (use any number to dial in)
        +1 929 436 2866
        +1 312 626 6799
        +1 669 900 6833
        400 669 9381 China Toll-free

International numbers available:

One tap mobile: +19294362866,,779283357# US (New York)
Join by SIP conference room system
Meeting ID: 779 283 357


Flyer.pdf178 KB