Dynamical spin squeezing via a higher-order Trotter-Suzuki approximation

Ji-Ying Zhang, Xiang-Fa Zhou, Guang-Can Guo, and Zheng-Wei Zhou
Phys. Rev. A 90, 013604 – Published 8 July 2014

Abstract

Here we provide a scheme of transforming the one-axis twisting Hamiltonian into a two-axis twisting Hamiltonian based on the higher-order Trotter-Suzuki approximation. Compared with the paper by Liu et al. [Phys. Rev. Lett. 107, 013601 (2011)], our method can reduce the number of controlling cycles from 1000 to 50. Moreover, it is also spin number independent and takes a shorter optimal evolution time as compared with the method of Shen et al. [Phys. Rev. A 87, 051801 (2013)]. The corresponding error analysis is also provided.

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  • Received 30 March 2014

DOI:https://doi.org/10.1103/PhysRevA.90.013604

©2014 American Physical Society

Authors & Affiliations

Ji-Ying Zhang, Xiang-Fa Zhou*, Guang-Can Guo, and Zheng-Wei Zhou

  • Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

  • *xfzhou@ustc.edu.cn
  • zwzhou@ustc.edu.cn

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Vol. 90, Iss. 1 — July 2014

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