Nonlinear time-reversal interferometry with arbitrary quadratic collective-spin interaction  

作　　者：胡知遥 李其贤 张轩晨 张贺宾 黄龙刚 刘永椿 Zhiyao Hu;Qixian Li;Xuanchen Zhang;He-Bin Zhang;Long-Gang Huang;Yong-Chun Liu(State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China;School of Physics,Xi'an Jiaotong University,Xi'an 710049,China;China Fire and Rescue Institute,Beijing 102202,China;Frontier Science Center for Quantum Information,Beijing 100084,China)

机构地区：[1]State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China [2]School of Physics,Xi'an Jiaotong University,Xi'an 710049,China [3]China Fire and Rescue Institute,Beijing 102202,China [4]Frontier Science Center for Quantum Information,Beijing 100084,China

出　　处：《Chinese Physics B》2024年第8期63-70,共8页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant No.2023YFA1407600);the National Natural Science Foundation of China (Grant Nos.12275145,92050110,91736106,11674390,and 91836302)。

摘　　要：Atomic nonlinear interferometry has wide applications in quantum metrology and quantum information science.Here we propose a nonlinear time-reversal interferometry scheme with high robustness and metrological gain based on the spin squeezing generated by arbitrary quadratic collective-spin interaction,which could be described by the Lipkin–Meshkov–Glick(LMG)model.We optimize the squeezing process,encoding process,and anti-squeezing process,finding that the two particular cases of the LMG model,one-axis twisting and two-axis twisting outperform in robustness and precision,respectively.Moreover,we propose a Floquet driving method to realize equivalent time reverse in the atomic system,which leads to high performance in precision,robustness,and operability.Our study sets a benchmark for achieving high precision and high robustness in atomic nonlinear interferometry.

关 键 词：time-reversal interferometry spin squeezing quantum metrology 

分 类 号：O413[理学—理论物理]