Toward arbitrary control of the quantum state in non-Hermitian spin-orbit coupled Fermi gases
POSTER
Abstract
Non-Hermitian spin-orbit coupled system is becoming attractive as its special features, such as non-Hermitian skin effect and chiral response when encircling around exceptional point (EP). Such a situation can be realized in 173Yb fermions by means of optical coupling between two internal states with atoms loss induced by a near-resonant light [1]. Here, we lay out our strategy for controlling quantum states on-demand near the EP. To minimize incoherent relaxation, we utilize a clock transition 578 nm, 1S0 → 3P0 in 173Yb as the dissipation laser, which benefits from a longer lifetime in 3P0 and less spontaneous emission [2], with another blast laser to remove atoms in excited 3P0 state. We will discuss how to prepare an arbitrary quantum state when encircling around the EP in the parameter space. A chiral behavior near the EP will be also discussed.
*We acknowledge the generous support from the Research Grants Councils of Hong Kong, Guangdong Joint laboratory and the Harilela foundation through 16306119, 16302420,16302821,16306321, 16306922, C6005-17G, C6009-20G, RFS2122-6S04, and N-HKUST636-22, respectively.
Publication: [1] Z. Ren, D. Liu, E. Zhao, C. He, K. K. Pak, J. Li, and G.-B. Jo, Nature Physics 18, 385-389 (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
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Ka Kwan Pak
- Hong Kong University of Science and Technology
- The Hong Kong University of Science and Technology