Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T33: Nonergodic Dynamics Beyond Many-Body Localization
11:30 AM–2:30 PM,
Thursday, March 9, 2023
Room: Room 225
Sponsoring
Unit:
DCMP
Chair: Michael Kolodrubetz, University of Texas at Dallas
Abstract: T33.00002 : Controlling dynamical many-body freezing via local driving*
11:42 AM–11:54 AM
Presenter:
Bhaskar Mukherjee
(University College London)
Authors:
Bhaskar Mukherjee
(University College London)
Ronald Melendrez
(Florida State University and National High Magnetic Field Laboratory)
Hitesh J Changlani
(Florida State University and National High Magnetic Field Laboratory)
Arijeet Pal
(University College London)
of certain initial states, in analogy with quantum scars. In this work, we show that under the influence of local
driving the phenomena of dynamical many-body freezing can be destabilized for a staggered Heisenberg spin-
1/2 chain in a uniform magnetic field. For the boundary-driven system, a fully polarized initial state crosses
over to slow thermalization, avoiding the phenomena of freezing. We show the origins of the instability using
analytic higher-order perturbative expansion of the Floquet Hamiltonian which is corroborated by numerical
exact diagonalization. Furthermore, by employing a multi-site driving protocol the freezing of the boundary
site can be restored giving rise to a rich entanglement structure. We develop a coherent picture of slow, local
thermalization and freezing under strong local driving for a broad class of interacting spin chains.
*B. M and A. P have been supported by the European Research Council (ERC) underthe European Union’s Horizon 2020 research and innovation program (Grant No. 853368). R. M and H. J. Chave been supported by FSU and NHMFL, funded by NSF/DMR-1644779 and the State of Florida, and NSFDMR-2046570.
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