1. dynamical aspect of flat-band many-body licalization

Yoshihito Kuno

University of Tsukuba, Japan

6 April 2021 Tue 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) phenomena are attracted in condensed matter community. MBL possesses rich physical contents compared to Anderson localization. The typical MBL occurs in disordered systems. But recently, MBL can occur under translational systems, i.e., disorder-free. Such a disorder-free localization is also attracted in condensed matter communities beyond study of the disordered MBL. Flat-band systems with interactions can be considered as a typical example of the disorder-free MBL, recently called flat-band many-body localization. In this talk, we show the dynamical aspects of the flat-band MBL in detail compared to the dynamical properties of the conventional MBL by using a Matrix product state simulation. In particular, we focus on the dynamical behavior of entanglement entropy, which is an important quantity to characterize thermalization and ergodicity of the system.