Localized dynamics following a quantum quench in a non-integrable system: an example on the sawtooth ladder

2020/10/26 by Rishabh Khare, Sayan Choudhury · 20 citations
Physics and Astronomy · #Boson #Cold Atom Physics and Bose-Einstein Condensates #Dynamics (music) #Entropy (arrow of time) #Ergodicity #Quantum #Quantum chaos and dynamical systems #Quantum dynamics #Quantum entanglement #Quantum many-body systems #Sawtooth wave #cond-mat.stat-mech #quant-ph

paper · pdf · doi:10.1088/1361-6455/abc499

published in Journal of Physics B Atomic Molecular and Optical Physics 54(1), 015301 (IOP Publishing) · 10 Pages, 8 Figures

openalex publication_date 2020/10/26 · openalex created_date 2020/11/09 · arxiv created 2021/01/02 · arxiv updated 2021/01/05 · openalex updated_date 2026/08/05

Abstract

Abstract Motivated by the recent discovery of ergodicity breaking in geometrically frustrated systems, we study the quench dynamics of interacting hardcore bosons on a sawtooth ladder. We identify a set of initial states for which this system exhibits characteristic signatures of localization like initial state memory retention and slow growth of entanglement entropy for a wide parameter regime. Remarkably, this localization persists even when the many-body spectrum is thermalizing. We argue that the localized dynamics originates from an interaction induced quantum interference. Our results show that the sawtooth ladder can be a fertile platform for realizing non-equilibrium quantum states of matter.

Citations

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