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

• URL: http://arxiv.org/abs/2201.00821v2
• Date: Mon, 22 May 2023 09:48:26 GMT
• Title: Observation of many-body scarring in a Bose--Hubbard quantum simulator
• Authors: Guo-Xian Su, Hui Sun, Ana Hudomal, Jean-Yves Desaules, Zhao-Yu Zhou, Bing Yang, Jad C. Halimeh, Zhen-Sheng Yuan, Zlatko Papi\'c, Jian-Wei Pan
• Abstract summary: We realize many-body scarring in a Bose-Hubbard quantum simulator from previously unknown initial conditions. We demonstrate that scarring traps the many-body system in a low-entropy subspace.
• Score: 6.039858993863839
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 $\mathbb{Z}_2$ 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.

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