摘要
We demonstrate high-fidelity manipulation of the quantized motion of a single87Rb atom in an optical tweezer via microwave couplings induced by Stern–Gerlach splitting. The Stern–Gerlach splitting is mediated by polarization gradient of a strongly focused tweezer beam that functions as fictitious magnetic field gradient. The spatial splitting removes the orthogonality of the atomic spatial wavefunctions, thus enables the microwave couplings between the motional states. We obtain coherent Rabi oscillations for up to third-order sideband transitions, in which a high fidelity of larger than 0.99 is obtained for the spin-flip transition on the first order sideband after subtraction of the state preparation and detection error. The Stern–Gerlach splitting is measured at a precision of better than 0.05 nm. This work paves the way for quantum engineering of motional states of single atoms, and may have wide applications in few body physics and ultracold chemistry.
作者
Kun-Peng Wang
Jun Zhuang
Xiao-Dong He
Rui-Jun Guo
Cheng Sheng
Peng Xu
Min Liu
Jin Wang
Ming-Sheng Zhan
王坤鹏;庄军;何晓东;郭瑞军;盛诚;许鹏;刘敏;王谨;詹明生(State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071;Center for Cold Atom Physics,Chinese Academy of Sciences,Wuhan 430071;University of Chinese Academy of Sciences,Beijing 100049)
基金
Supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0304501,2016YFA0302800 and 2016YFA0302002)
the Key Research Program of Frontier Science of the Chinese Academy of Sciences(CAS)(Grant No.ZDBS-LY-SLH012)
the National Natural Science Foundation of China(Grant No.11774389)
the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB21010100)
the Youth Innovation Promotion Association CAS(Grant No.2019325).
