Multiple-quantum-coherence dynamics of spin-1 Bose–Einstein condensate during quantum phase transitions  

作　　者：Fulin Deng Peng Xu Su Yi Wenxian Zhang 

机构地区：[1]Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education,School of Physics and Technology,Wuhan University,Wuhan,Hubei 430072,China [2]School of Physics,Zhengzhou University,Zhengzhou 450001,China [3]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [4]CAS Center for Excellence in Topological Quantum Computation&School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [5]Wuhan Institute of Quantum Technology,Wuhan,Hubei 430206,China

出　　处：《Communications in Theoretical Physics》2024年第1期105-110,共6页理论物理通讯（英文版）

基　　金：supported by the NSAF under Grant No.U1930201;the National Natural Science Foundation of China(NSFC)under Grant Nos.12274331,91836101,12135018,12204428;the Innovation Program for Quantum Science and Technology under Grant No.2021ZD0302100。

摘　　要：Multiple quantum coherences are often employed to describe quantum many-body dynamics in nuclear spin systems and recently,to characterize quantum phase transitions in trapped ions.Here we investigate the multiple-quantum-coherence dynamics of a spin-1 Bose–Einstein condensate.By adjusting the quadratic Zeeman shift,the condensate exhibits three quantum phases.Our numerical results show that the spectrum of multiple quantum coherence does indeed catch the quantum critical points.More importantly,with only a few low-order multiple quantum coherences,the spin-1 condensate exhibits rich signals of the many-body dynamics,beyond conventional observables.The experimental implementation of such multiple quantum coherence protocol is also discussed.

关 键 词：Bose-Einstein condensate spin-mixing dynamics quantum phase transitions multiple-quantum-coherences quantum entanglement 

分 类 号：O469[理学—凝聚态物理]