%ABluvstein, D. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AOmran, A. [Department of Physics, Harvard University, Cambridge, MA 02138, USA., QuEra Computing Inc., Boston, MA 02135, USA.]%ALevine, H. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AKeesling, A. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%ASemeghini, G. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AEbadi, S. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AWang, T. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AMichailidis, A. [IST Austria, Am Campus 1, 3400 Klosterneuburg, Austria.]%AMaskara, N. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AHo, W. [Department of Physics, Harvard University, Cambridge, MA 02138, USA., Department of Physics, Stanford University, Stanford, CA 94305, USA.]%AChoi, S. [Department of Physics, University of California Berkeley, Berkeley, CA 94720, USA.]%ASerbyn, M. [IST Austria, Am Campus 1, 3400 Klosterneuburg, Austria.]%AGreiner, M. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%AVuletić, V. [Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.]%ALukin, M. [Department of Physics, Harvard University, Cambridge, MA 02138, USA.]%BJournal Name: Science; Journal Volume: 371; Journal Issue: 6536; Related Information: CHORUS Timestamp: 2021-05-13 19:02:43 %D2021%IAmerican Association for the Advancement of Science (AAAS) %JJournal Name: Science; Journal Volume: 371; Journal Issue: 6536; Related Information: CHORUS Timestamp: 2021-05-13 19:02:43 %K %MOSTI ID: 10218865 %PMedium: X %TControlling quantum many-body dynamics in driven Rydberg atom arrays %X

The control of nonequilibrium quantum dynamics in many-body systems is challenging because interactions typically lead to thermalization and a chaotic spreading throughout Hilbert space. We investigate nonequilibrium dynamics after 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 show that coherent revivals associated with so-called quantum many-body scars 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 new ways to steer complex dynamics in many-body systems and enabling potential applications in quantum information science.

%0Journal Article