Observation of Dynamical Quantum Phase Transition in Antiferromagnetic Spinor Bose-Einstein Condensates

ORAL

Abstract

We experimentally study dynamical quantum phase transition (DQPT) in a many-body system with up to tens of thousands particles. We observe non-equilibrium dynamics after a sudden quench of the quadratic Zeeman energy using microwave dressing field. We chose a new observable as indictor of DQPT. The discontinuity of this observable near the transition point indicates the occurrence of DQPT in the system. The experimental result agrees well with theoretical prediction. Our experimental approach mainly overcomes challenges associated with long-time evolution after the quench.

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Authors

  • Haoxiang Yang

    • Tsinghua University

  • Tian Tian

    • Tsinghua University

  • Liyuan Qiu

    • Tsinghua University

  • Haiyu Liang

    • Tsinghua University

  • Yanbin Yang

    • Tsinghua University

  • Ceren Burcak Dag

    • University of Michigan

  • Anjun Chu

    • Tsinghua University

  • Yong Xu

    • Tsinghua University

  • Yingmei Liu

    • Oklahoma State University

  • Luming Duan

    • Tsinghua University