Towards the Realization of Tunable Open Quantum System using the Clock Transition

POSTER

Abstract

Spin-orbit-coupled (SOC) atoms with tunable dissipation offer a great opportunity to study the non-Hermitian quantum system. In such a system, controlled dissipation is realized by state-selective atom loss which enables the closing of energy gap opened by SOC and allows us to explore chiral behavior of quantum state evolution near the exceptional point (EP). In 173Yb ultracold fermions, for example, a 556 nm transition (1S0 → 3P1) has been used to control the dissipation [1], but there remains a challenge of the study of many-body non-Hermitian physics due to the rapid relaxation of the system. To overcome this, we plan to implement the atom loss using the clock transition 1S0 → 3P0 [2]. We expect the clock transition will prevent atoms from jumping back from excited state to ground state within the experimental time scale, which reduces the undesirable heating and therefore relaxation.

*We acknowledge the generous support from the Research Grants Councils of Hong Kong, the Croucher Foundation, Guangdong Joint laboratory and the Harilela foundation through 16304918, 16308118, 16306119, 16302420, 16302821, C6005-17G, C6009-20G, RFS2122-6S04 and N-HKUST601/17, respectively.

Publication: [1] Z. Ren, D. Liu, E. Zhao, C. He, K. K. Pak, J. Li, and G.-B. Jo, Nature Physics (2022).
[2] E. Hajiyev, K. K. Pak, C. He, Z. Ren, E. Zhao, and G.-B. Jo, Journal of the Korean Physical Society 79, 930-936 (2021).

Presenters

  • Ka Kwan PAK

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China
    • Hong Kong University of Science and Technology
    • The Hong Kong University of Science and Technology

Authors

  • Ka Kwan PAK

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China
    • Hong Kong University of Science and Technology
    • The Hong Kong University of Science and Technology

  • Zejian Ren

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China
    • The Hong Kong University of Science and Technology

  • Elnur Hajiyev

    • The Hong Kong University of Science and Technology

  • Entong ZHAO

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China
    • Hong Kong University of Science and Technology(HKUST)
    • The Hong Kong University of Science and Technology

  • Chengdong HE

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China
    • Hong Kong University of Science and Technology
    • The Hong Kong University of Science and Technology

  • Gyu-Boong Jo

    • Hong Kong University of Science and Tech
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China; IAS Center for Quantum Technologies, Clear Water Bay, Kowloon, Hong Kong SAR, China
    • Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; IAS Center for Quantum Technologies, HKUST, Clear Water
    • The Hong Kong University of Science and Technology