Andrii Sotnikov

V.N. Karazin National University, Ukraine

8 August 2023 Tue 4 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                     

We study theoretically transitions between the localized and chaotic many-body regimes in one-dimensional quantum lattice systems with long-range couplings between particles and linear external potential [1]. In terms of established criteria characterizing localization, we construct effective phase diagrams for several types of lattice systems with variable amplitude of the external linear tilt and interaction strength. By means of exact diagonalization and time-dependent variational principle numerical approaches we analyze system dynamics after quenches. Our results reveal that the Stark localization without any artificial source of disorder remains stable upon inclusion of long-range interactions.

[1] I.V. Lukin, Yu.V. Slyusarenko, A.G. Sotnikov,, Phys. Rev. B 105, 184307 (2022).

The work is supported by the National Research Foundation of Ukraine, Grant No. 0120U104963.

  1. many-body localization in wannier-stark ladders with long-range interactions