Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 57: Quantum Gases II
Q 57.3: Poster
Thursday, March 17, 2022, 16:30–18:30, P
Observation of unconventional many-body scarring in a quantum simulator — •Guo-Xian Su1, Hui Sun1, Ana Hudomal2, Jean-Yves Desaules2, Zhao-Yu Zhou1, Bing Yang3, Jad Halimeh4, Zhen-Sheng Yuan1, Zlatko Papić2, and Jian-Wei Pan1 — 1Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Im Neuenheimer Feld 226 — 3Department of Physics, Southern University of Science and Technology, Shenzhen, China — 4INO-CNR BEC Center and Department of Physics, University of Trento, Via Sommarive 14, I-38123 Trento, Italy
Quantum many-body scarring has recently opened a window into novel mechanisms for delaying the onset of thermalization, however its experimental realization remains limited to the Z2 state in a Rydberg atom system. Here we realize unconventional many-body scarring in a Bose–Hubbard quantum simulator and extend scarring to the unit-filling state. Our measurements of entanglement entropy illustrate that scarring traps the many-body system in a low-entropy subspace. Further, we develop a quantum interference protocol to probe out-of-time correlations, and demonstrate the system’s return to the vicinity of the initial state by measuring single-site fidelity. Our work makes the resource of scarring accessible to a broad class of ultracold-atom experiments, and it allows to explore its relation to constrained dynamics in lattice gauge theories, Hilbert space fragmentation, and disorder-free localization.