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arXiv · 2012.12276

Controlling many-body dynamics with driven quantum scars in Rydberg atom arrays

Dolev Bluvstein·Ahmed Omran·Harry Levine·Alexander Keesling·Giulia Semeghini·Sepehr Ebadi·Tout T. Wang·Alexios A. Michailidis·Nishad Maskara·Wen Wei Ho·Soonwon Choi·Maksym Serbyn·Markus Greiner·Vladan Vuletic·Mikhail D. Lukin
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Abstract

Controlling non-equilibrium quantum dynamics in many-body systems is an outstanding challenge as interactions typically lead to thermalization and a chaotic spreading throughout Hilbert space. We experimentally investigate non-equilibrium dynamics following rapid quenches in a many-body system composed of 3 to 200 strongly interacting qubits in one and two spatial dimensions. Using a programmable quantum simulator based on Rydberg atom arrays, we probe coherent revivals corresponding to quantum many-body scars. Remarkably, we discover that scar revivals can be stabilized by periodic driving, which generates a robust subharmonic response akin to discrete time-crystalline order. We map Hilbert space dynamics, geometry dependence, phase diagrams, and system-size dependence of this emergent phenomenon, demonstrating novel ways to steer entanglement dynamics in many-body systems and enabling potential applications in quantum information science.

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Dolev Bluvstein, Ahmed Omran, Harry Levine, Alexander Keesling, Giulia Semeghini, Sepehr Ebadi, Tout T. Wang, Alexios A. Michailidis, Nishad Maskara, Wen Wei Ho, Soonwon Choi, Maksym Serbyn, Markus Greiner, Vladan Vuletic, Mikhail D. Lukin. 2020-12-22. Controlling many-body dynamics with driven quantum scars in Rydberg atom arrays. https://doi.org/10.1126/science.abg2530

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