Seminar über Theoretische Festkörperphysik |
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Vortragender: | Nicolas Laflorencie |
Datum: | 15.06.2020 14:00 |
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Ort: | This seminar will take place as an online event. |
Zugehörigkeit: | Université de Toulouse, France |
Gastgeber: | Elmer Doggen |
Abstract
Despite tremendous theoretical efforts to understand the subtleties of the many-body localization (MBL) transition, many questions remain open, in particular concerning its critical properties and microscopic mechanisms. In this talk, I will try to bring new pieces to improve our understanding of this complicated landscape by presenting two recent results obtained for the random-field Heisenberg chain using numerical simulations, scaling analysis, and strong disorder arguments. In short, I will discuss the multifractal properties across the MBL transition [1] and a newly discovered chain breaking mechanism [2] which characterises the MBL regime as well as the transition, whose scaling properties agree with a Kosterlitz-Thouless scenario.
[1] N. Macé, F. Alet, N. Laflorencie, Multifractal scalings across the many-body localization transition, Phys. Rev. Lett. 123, 180601 (2019).
[2] N. Laflorencie, G. Lemarié, N. Macé, Chain breaking and Kosterlitz-Thouless scaling at the many-body localization transition, arXiv:2004.02861