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Conditional generation of multiphoton-subtracted squeezed vacuum states: loss consideration and operator description

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Abstract

In terms of the characteristic functions of the quantum states, we present a complete operator description of a lossy photon-subtraction scheme. Feeding a single-mode squeezed vacuum into a variable beam splitter and counting the photons in one of the output channels, a broad class of multiphoton-subtracted squeezed vacuum states (MSSVSs) can be generated in other channel. Here, the losses are considered in the beginning and the end channels in the circuit. Indeed, this scheme has been discussed in Ref. [Phys. Rev. A 100, 022341 (2019)]. However, different from the above work, we give all the details of the optical fields in all stages. In addition, we present the analytical expressions and numerical simulations for the success probability, the quadrature and number squeezing effect, photon number distribution, and Wigner function of the MSSVSs. Some interesting results effected by the losses are obtained.

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Authors and Affiliations

  1. College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang, 330022, China

    Xue-xiang Xu

  2. School of Electrical and Information Engineering, Changzhou Institute of Technology, Changzhou, 213032, China

    Hong-chun Yuan

Authors
  1. Xue-xiang Xu
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  2. Hong-chun Yuan
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Correspondence to Xue-xiang Xu.

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This project was supported by the National Natural Science Foundation of China (No.11665013).

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Xu, Xx., Yuan, Hc. Conditional generation of multiphoton-subtracted squeezed vacuum states: loss consideration and operator description. Quantum Inf Process 19, 324 (2020). https://doi.org/10.1007/s11128-020-02823-1

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