Propagation of Many-body Localization in an Anderson Insulator

Autor:	Brighi, Pietro, Michailidis, Alexios A., Abanin, Dmitry A., Serbyn, Maksym
Rok vydání:	2021
Předmět:	Condensed Matter - Disordered Systems and Neural Networks Condensed Matter - Quantum Gases Condensed Matter - Statistical Mechanics Quantum Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.105.L220203
Popis:	Many-body localization (MBL) is an example of a dynamical phase of matter that avoids thermalization. While the MBL phase is robust to weak local perturbations, the fate of an MBL system coupled to a thermalizing quantum system that represents a "heat bath" is an open question that is actively investigated theoretically and experimentally. In this work we consider the stability of an Anderson insulator with a finite density of particles interacting with a single mobile impurity -- a small quantum bath. We give perturbative arguments that support the stability of localization in the strong interaction regime. Large scale tensor network simulations of dynamics are employed to corroborate the presence of the localized phase and give quantitative predictions in the thermodynamic limit. We develop a phenomenological description of the dynamics in the strong interaction regime, and demonstrate that the impurity effectively turns the Anderson insulator into an MBL phase, giving rise to non-trivial entanglement dynamics well captured by our phenomenology. Comment: Added references
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2109.07332 Zobrazit plný text záznamu View this record from Arxiv