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Updated: Oct 20, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Discrete Time-Crystalline Order Enabled by Quantum Many-Body Scars: Entanglement Steering via Periodic Driving.
N Maskara1, A A Michailidis2, W W Ho1,3
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|September 10, 2021
Summary
Periodic driving stabilizes quantum many-body scars in Rydberg atom arrays, creating time-crystalline behavior. This control method offers a new route for manipulating quantum entanglement in complex systems.
Area of Science:
- Quantum physics
- Many-body dynamics
- Quantum information science
Background:
- Controlling complex quantum dynamics is crucial for quantum technologies.
- Rydberg atom arrays show promise for generating entangled states.
- Quantum many-body scars and periodic driving offer new control mechanisms.
Purpose of the Study:
- To analyze the origin of stabilized quantum many-body scars and subharmonic responses in a related model.
- To understand the connection between spatiotemporal ordering and prethermal time-crystalline behavior.
- To explore the role of initial states in stabilizing these phenomena.
Main Methods:
- Analysis of a simplified model related to Rydberg atom array experiments.
- Investigation of effective Floquet unitary transformations.
- Study of spatiotemporal ordering and its relation to quantum scars.
Main Results:
- Identified spatiotemporal ordering in an effective Floquet unitary as the origin of phenomena.
- Demonstrated discrete time-crystalline behavior in a prethermal regime.
- Showed that subharmonic response is specific to Néel-like initial states associated with quantum scars.
Conclusions:
- Periodic driving combined with many-body scars provides a route to control entanglement.
- The findings suggest robustness to perturbations and observable emergent timescales.
- This approach offers a novel method for manipulating quantum dynamics in complex systems.
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