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SCIENCE CHINA Information Sciences, Volume 64 , Issue 12 : 229501(2021) https://doi.org/10.1007/s11432-020-3037-1

Quantum illumination with post-processing of displacement and anti-displacement operations

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  • ReceivedFeb 27, 2020
  • AcceptedAug 3, 2020
  • PublishedMay 26, 2021

Abstract

There is no abstract available for this article.


Acknowledgment

This work was supported by National Natural Science Foundation of China (Grant Nos. 11574400, 11204379, 11981240356).


Supplement

Appendixes A–C. Appendix A is about the scheme of quantum illumination and basic formalism. Appendix B describes the quantum state evolution in illumination. Appendix C shows the physical implementation of on-line displacement operation.


References

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  • Figure 1

    (Color online) (a) Target detection in the two-mode squeezed state. (b) Enhanced target detection via displacement and anti-displacement operations. On considering a displacement amplitude of zero, this scheme is reduced to the traditional quantum illumination scheme. (c) Channel model of the interaction with the target. (d) Practical implementation of displacement operation using a beam splitter with transmittance $T_0$, ancillary coherent states $|\beta_0\rangle$, and $|-\beta_0\rangle$ in $F$ and $G$ modes. BS1 is a beam splitter with transmittance $T=1-\kappa$; it is used to model the target. Trash boxes denote the discarding operation. (e) Value of $Q_{E^\prime~A}$ for a low-reflectivity target in a noisy environment, such that $\kappa_t=0.05$, $N_s=0.5$, and $N_B=5$. (f) Its corresponding $P_\mathrm{QCB}^M$ for $M=1000$.

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