Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.090602
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Funding
- Center for Ultracold Atoms
- National Science Foundation
- Vannevar Bush Faculty Fellowship
- U.S. Department of Energy
- Army Research Office MURI
- DARPA ONISQ program
- European Research Council (ERC) under the European Union [850899]
- Moore Foundation EPiQS initiative [GBMF4306]
- National University of Singapore (NUS) Development Grant AY2019/2020
- Stanford Institute for Theoretical Physics
- NSF Graduate Research Fellowship Program [DGE1745303]
- Fannie and John Hertz Foundation
- Miller Institute for Basic Research in Science
- DOE Quantum Systems Accelerator [7568717]
- DOE Programmable Quantum Simulators for Lattice Gauge Theories and Gauge-Gravity Correspondence [DE-SC0021013]
- Department of Energy Computational Science Graduate Fellowship [DE-SC0021110]
- U.S. Department of Energy (DOE) [DE-SC0021110] Funding Source: U.S. Department of Energy (DOE)
- European Research Council (ERC) [850899] Funding Source: European Research Council (ERC)
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Recent experiments in Rydberg atom arrays have shown that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving. This behavior originates from spatiotemporal ordering in an effective Floquet unitary, displaying discrete time-crystalline behavior in a prethermal regime. The subharmonic response exists only for certain initial states and shows robustness to perturbations, suggesting a potential route to controlling entanglement in interacting quantum systems.
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 Neel-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.
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