1. identifying correlation clusters in many-body localized systems

Kévin Hémery

Technical University of Munich, Germany

14 October 2021 Thu 5 pm

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

Many-body localization (MBL) is a primary example of a robust mechanism allowing to escape quantum thermalization. In this talk, I will present a new technique for analysing the structure of quantum states of MBL spin chains. This approach is based on correlation clusters that are identified from pairwise correlations. This technique is used to study the eigenstates of a disordered XXZ spin chain across the MBL to ergodic transition, as well as the non-equilibrium dynamics in the MBL phase following a global quantum quench. It is computationally inexpensive, can be used in combination with matrix product state methods, and is relevant for a range of experimental settings including cold atoms.