Dynamics of fractional Chern insulators under global quantum quenches
ORAL
Abstract
Recent progress in the control of synthetic gauge fields in optical lattices has brought the realization of strongly correlated topological phases in cold atom experiments within reach. Due to longer time scales compared to solid state systems, the quantum dynamics in such setups are experimentally more amenable and may encode information about the topological properties of the state. In this work, we investigate quantum quenches between Hamiltonians with a fractional Chern insulator (FCI) ground state and topologically trivial Hamiltonians. Focusing on the experimentally realized Hofstadter model, we study the post-quench behavior of various quantities such as edge currents, Hall response and Loschmidt echo and determine how they display signatures of the topologically ordered initial state. Furthermore, we comment on implications for dynamically detecting FCI states in cold atom experiments.
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Presenters
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Johannes Motruk
University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, Lawrence Berkeley National Laboratory
Authors
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Johannes Motruk
University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, Lawrence Berkeley National Laboratory
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Joel Moore
University of California, Berkeley, Department of Physics, University of California, Berkeley, California 94720, USA, University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, University of California, Berkeley, and Lawrence Berkeley National Laboratory