Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms

Nature Communications
Jiaming LiLe Luo

Abstract

Open physical systems with balanced loss and gain, described by non-Hermitian parity-time [Formula: see text] reflection symmetric Hamiltonians, exhibit a transition which could engender modes that exponentially decay or grow with time, and thus spontaneously breaks the [Formula: see text]-symmetry. Such [Formula: see text]-symmetry-breaking transitions have attracted many interests because of their extraordinary behaviors and functionalities absent in closed systems. Here we report on the observation of [Formula: see text]-symmetry-breaking transitions by engineering time-periodic dissipation and coupling, which are realized through state-dependent atom loss in an optical dipole trap of ultracold 6Li atoms. Comparing with a single transition appearing for static dissipation, the time-periodic counterpart undergoes [Formula: see text]-symmetry breaking and restoring transitions at vanishingly small dissipation strength in both single and multiphoton transition domains, revealing rich phase structures associated to a Floquet open system. The results enable ultracold atoms to be a versatile tool for studying [Formula: see text]-symmetric quantum systems.

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Citations

Sep 7, 2019·Physical Review Letters·Kohei KawabataMasatoshi Sato
Sep 7, 2019·Physical Review Letters·Xi-Wang Luo, Chuanwei Zhang
Feb 1, 2020·Physical Review Letters·Yaoming ChuJianming Cai
Dec 24, 2019·Physical Review Letters·Lei XiaoPeng Xue
Sep 23, 2020·Materials·Maksym DubSergey Rumyantsev
Oct 22, 2019·Physical Review Letters·Kazuki YamamotoNorio Kawakami
Dec 13, 2019·Advanced Materials·Samit Kumar GuptaYan-Feng Chen
Sep 17, 2019·Physical Review Letters·Ryusuke HamazakiMasahito Ueda
Mar 14, 2020·Physical Review Letters·Nobuyuki OkumaMasatoshi Sato
Feb 6, 2020·Scientific Reports·B Jaramillo ÁvilaB M Rodríguez-Lara
May 22, 2019·Physical Review. E·Wen-Lei ZhaoPeiqing Tong
Sep 7, 2019·Physical Review Letters·Kazuki Yokomizo, Shuichi Murakami
Jul 9, 2020·Physical Review Letters·Linhu LiJiangbin Gong
Jan 16, 2021·Physical Review Letters·Norifumi MatsumotoMasahito Ueda
Nov 17, 2020·Physical Review Letters·Yifei Yi, Zhesen Yang
Jan 23, 2021·Physical Review Letters·Haiping Hu, Erhai Zhao
Mar 13, 2021·Physical Review Letters·Liangyu DingWei Zhang
Mar 13, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Xi-Xi BaoLei Tan
May 15, 2021·Physical Review Letters·Wenquan LiuJiangfeng Du
May 14, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Yu-Guo LiuZhi Li
Jun 22, 2021·Physical Review Letters·Taylor L PattiSusanne F Yelin
Sep 17, 2020·Nano Letters·Huilai ZhangHui Jing
Aug 27, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Yi-Bin GuoTao Xiang
Sep 30, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Wen-Yuan Wang, Wen-Lei Zhao
Dec 22, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Longwen Zhou, Yongjian Gu

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