SKM 2021 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 3: Poster Sesssion I: Quantum Chaos and Many-Body Quantum Dynamics
DY 3.10: Poster
Dienstag, 28. September 2021, 17:30–19:30, P
Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system — •Sebastian Stumper1, Michael Thoss1,2, and Junichi Okamoto1,2 — 1Institute of Physics, University of Freiburg — 2EUCOR Centre for Quantum Science and Quantum Computing, University of Freiburg
We investigate the dynamical quantum phase transitions (DQPTs) in the one-dimensional extended Bose-Hubbard model after a sudden quench of the nearest-neighbor interaction strength. We show that interaction-driven DQPTs can appear after quenches between two topologically trivial insulating phases based on extensive matrix-product-states simulations. The threshold value of the quench parameter for the DQPTs does not coincide with the equilibrium phase boundaries, which is contrary to the DQPTs between topologically distinct phases. Furthermore, we define a new set of string and parity order parameters to characterize the dynamics and find a close connection between DQPTs and these order parameters for both types of quenches. Finally, the timescales of DQPTs are also studied, revealing different kinds of power laws for the topological and interaction-driven cases.