Discrete Time-Crystalline Order Enabled by Quantum Many-Body Scars: Entanglement Steering via Periodic Driving

The control of many-body quantum dynamics in complex systems is a key challenge in the quest to reliably produce and manipulate large-scale quantum entangled states. Recently, quench experiments in Rydberg atom arrays [Bluvstein et al. Science 371, 1355 (2021)] demonstrated that coherent revivals as...

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Bibliographic Details
Published in:Physical review letters 2021-08, Vol.127 (9), p.090602-090602, Article 090602
Main Authors: Maskara, N., Michailidis, A. A., Ho, W. W., Bluvstein, D., Choi, S., Lukin, M. D., Serbyn, M.
Format: Article
Language:English
Subjects:
Complex systems
Crystal structure
Crystallinity
Eigenstate thermalization
Entangled states
Entanglement
Entanglement in quantum gases
Floquet systems
Perturbation
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum quench
Quantum scars
Quantum simulation
Scars
Spontaneous symmetry breaking
Steering
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Summary:The control of many-body quantum dynamics in complex systems is a key challenge in the quest to reliably produce and manipulate large-scale quantum entangled states. Recently, quench experiments in Rydberg atom arrays [Bluvstein et al. Science 371, 1355 (2021)] demonstrated that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving, generating stable subharmonic responses over a wide parameter regime. We analyze a simple, related model where these phenomena originate from spatiotemporal ordering in an effective Floquet unitary, corresponding to discrete time-crystalline behavior in a prethermal regime. Unlike conventional discrete time crystals, the subharmonic response exists only for Néel-like initial states, associated with quantum scars. We predict robustness to perturbations and identify emergent timescales that could be observed in future experiments. Our results suggest a route to controlling entanglement in interacting quantum systems by combining periodic driving with many-body scars.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.127.090602