Observation of many-body scarring in a Bose-Hubbard quantum simulator

Year: 2023

Authors: Su GX., Sun H., Hudomal A., Desaules JY., Zhou ZY., Yang B., Halimeh JC., Yuan ZS., Papie Z., Pan JW.

Autors Affiliation: Univ Sci & Technol China, Dept Modern Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China; Heidelberg Univ, Phys Inst, Neuenheimer Feld 226, D-69120 Heidelberg, Germany; Univ Sci & Technol China, CAS Ctr Excellence, Hefei 230026, Anhui, Peoples R China; Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum Ph, Hefei 230026, Anhui, Peoples R China; Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, England; Univ Belgrade, Inst Phys Belgrade, Belgrade 11080, Serbia; Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dept Phys, Via Sommar 14, I-38123 Trento, Italy.

Abstract: The ongoing quest for understanding nonequilibrium dynamics of complex quantum systems underpins the foundation of statistical physics as well as the development of quantum technology. Quantum many-body scarring has recently opened a window into novel mechanisms for delaying the onset of thermalization by preparing the system in special initial states, such as the Z2 state in a Rydberg atom system. Here we realize many-body scarring in a Bose-Hubbard quantum simulator from previously unknown initial conditions such as the unit-filling state. We develop a quantum-interference protocol for measuring the entanglement entropy and demonstrate that scarring traps the many-body system in a low-entropy subspace. Our work makes the resource of scarring accessible to a broad class of ultracold-atom experiments, and it allows one to explore the relation of scarring to constrained dynamics in lattice gauge theories, Hilbert space fragmentation, and disorder-free localization.

Journal/Review: PHYSICAL REVIEW RESEARCH

Volume: 5 (2)      Pages from: 23010-1  to: 23010-13

More Information: We thank P. Hauke, B. Mukherjee, C. Turner, and A. Michailidis for useful discussions. The experiment is supported by NNSFC Award No. 12125409, the Anhui Initiative in Quantum Information Technologies, and the Chinese Academy of Sciences. A.H., J.-Y.D., and Z.P. acknowledge support from EPSRC Grant No. EP/R513258/1 and from Leverhulme Trust Research Leadership Award No. RL-2019-015. A.H. acknowledges funding provided by the Institute of Physics Belgrade, through a grant from the Ministry of Education, Science, and Technological Development of the Republic of Serbia. Part of the numerical simulations were performed at the Scientific Computing Laboratory, National Center of Excellence for the Study of Complex Systems, Institute of Physics Belgrade. J.C.H. acknowledges support from Provincia Autonoma di Trento, the ERC starting grant StrEnQTh (Project No. 804305) , the Google Research Scholar award ProGauge, and Q@TN-Quantum Science and Technology in Trento. B.Y. acknowledges support from National Key R & D Program of China (Grant No. 2022YFA1405800) and NNSFC (Grant No. 12274199) .
KeyWords: Statistical-mechanics; Thermalization; Dynamics; Systems; Gases; Chaos
DOI: 10.1103/PhysRevResearch.5.023010

Citations: 59
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