Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session W33: Quantum Thermalization
3:00 PM–6:00 PM,
Thursday, March 9, 2023
Room: Room 225
Sponsoring
Unit:
DCMP
Chair: Michael Gullans, Joint Center for Quantum Information and Computer Science
Abstract: W33.00004 : Relaxation dynamics after a global quench in the massive XXZ chain
3:36 PM–3:48 PM
Presenter:
Flávia B Ramos
(Technical University of Kaiserslautern)
Authors:
Imke Schneider
(Technical University of Kaierslautern)
Flávia B Ramos
(Technical University of Kaiserslautern)
Jesko Sirker
(University of Manitoba)
Andrew Urichuk
(Univ of Manitoba)
for the investigation of interaction effects in out-of-equilibrium properties of quantum many-body
systems. We investigate the relaxation dynamics of equal-time correlations after a global quantum
quench of the anisotropy within the antiferromagnetic phase of the XXZ chain. In particular, we
consider the classical Neel state as the initial state. Using the exact solution of an effective free
model, numerical simulations and the quench action approach, we show that the late-time relaxation
of the oscillation amplitudes is characterized by a power-law decay with interaction-independent
exponents. Conversely, stationary values, amplitudes and oscillations frequencies depend on the
anisotropy. Overall, we show remarkable agreement in the results obtained from the distinct approaches.
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