Unconventional many-body scarring in a Bose--Hubbard quantum simulator

ORAL

Abstract

Quantum many-body scarring presents a novel mechanism that delays the onset of thermal equilibrium in non-integrable models. Using a large-scale Bose--Hubbard quantum simulator, we realize many-body scarring by emulating the PXP model with the tilted optical lattice and subsequently extending the scarring phenomenon to an unconventional regime in the unity-filling state. We demonstrate the combination of detuning and periodic driving deters the scrambling of initial state information by measuring the quantum fidelity of single-site subsystems with many-body interference in a superlattice. The interference protocol also helps read out single-site entanglement entropy, which further illustrates the trapping of the many-body system in a low-entropy subspace. Our work paves the way for investigating many-body scars in ultracold-atom experiments and exploring its relation to lattice gauge theories, Hilbert space fragmentation, and disorder-free localization.

*The experiment is supported by the NNSFC 12125409, the Anhui Initiative in Quantum Information Technologies, and the Chinese Academy of Sciences. A.H., J.-Y.D., and Z.P.~acknowledge support by EPSRC grant EP/R513258/1 and by the Leverhulme Trust Research Leadership Award RL-2019-015. A. H. acknowledges funding provided by the Institute of Physics Belgrade, through the grant by 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 by Provincia Autonoma di Trento, the ERC Starting Grant StrEnQTh (project ID 804305), the Google Research Scholar Award ProGauge, and Q@TN -- Quantum Science and Technology in Trento.

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Publication: arXiv:2201.00821

Presenters

  • Guo-Xian Su

    • Heidelberg University

Authors

  • Guo-Xian Su

    • Heidelberg University

  • Hui Sun

    • Heidelberg University

  • Ana Hudomal

    • Univ of Leeds

  • Jean-Yves M Desaules

    • Univ of Leeds

  • Zhaoyu Zhou

    • Heidelberg University

  • Bing Yang

    • Southern University of Science and Technology

  • Jad C Halimeh

    • INO-CNR BEC Center and Department of Physics, Uni Trento

  • Zhensheng Yuan

    • University of Science and Technology of China

  • Zlatko Papic

    • Univ of Leeds

  • Jian-Wei Pan

    • University of Science and Technology of China