期刊
PHYSICAL REVIEW RESEARCH
卷 5, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.5.023010
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The ongoing quest for understanding nonequilibrium dynamics of complex quantum systems has led to the discovery of quantum many-body scarring. This phenomenon allows for the delay of thermalization by preparing the system in special initial states. In this study, the researchers demonstrate many-body scarring in a Bose-Hubbard quantum simulator, using previously unknown initial conditions. This work opens up new possibilities for exploring the relationship between scarring and various quantum phenomena.
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.
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