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Protecting Spin Squeezing with Square Noise

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Abstract

Here we provide two schemes to eliminate the square noise in the collective angular momentum during the generation of one-axis twisting (OAT) squeezed spin states (SSSs) by using the Radio frequency (RF) pulses. The first scheme can effectively overcome the detrimental noise and gives us a bare OAT Hamiltonian at last. The second one may also remove the noise well enough and finally offers us a two-axis twisting (TAT) Hamiltonian. In other words, it can both protect and enhance the OAT Hamiltonian. The corresponding theoretical analysis and numerical simulations are presented in the paper.

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Acknowledgments

This work was funded by National Natural Science Foundation of China (Grant No.11547244 and No.11547208) and Science and Technology Research Project of Hubei Provincial Department of Education (Grant No.B2014067).

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Authors and Affiliations

  1. Institute for Interdisciplinary Research, Jianghan University, Wuhan, 430056, China

    Ji-Ying Zhang, Shan Wu, Wang-Ting Lu & Hong-Mei Chen

  2. Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, 230026, China

    Yong-Chang Zhang

  3. School of Physics and Information Engineering, Jianghan University, Wuhan, 430056, China

    Xing Li

  4. School of Science, QingDao University of Technology, Qingdao, 266033, China

    Chun-Hong Zheng

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  1. Ji-Ying Zhang
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  2. Yong-Chang Zhang
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  5. Wang-Ting Lu
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Correspondence to Ji-Ying Zhang.

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Zhang, JY., Zhang, YC., Wu, S. et al. Protecting Spin Squeezing with Square Noise. Int J Theor Phys 56, 521–529 (2017). https://doi.org/10.1007/s10773-016-3194-5

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  • DOI: https://doi.org/10.1007/s10773-016-3194-5

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