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Quantum enhanced multiple-phase estimation with multi-mode N00N states

Author

Listed:
  • Seongjin Hong

    (Korea Institute of Science and Technology (KIST))

  • Junaid ur Rehman

    (Korea Institute of Science and Technology (KIST)
    Kyung Hee University)

  • Yong-Su Kim

    (Korea Institute of Science and Technology (KIST)
    KIST School, Korea University of Science and Technology)

  • Young-Wook Cho

    (Korea Institute of Science and Technology (KIST)
    Yonsei University)

  • Seung-Woo Lee

    (Korea Institute of Science and Technology (KIST))

  • Hojoong Jung

    (Korea Institute of Science and Technology (KIST))

  • Sung Moon

    (Korea Institute of Science and Technology (KIST)
    KIST School, Korea University of Science and Technology)

  • Sang-Wook Han

    (Korea Institute of Science and Technology (KIST)
    KIST School, Korea University of Science and Technology)

  • Hyang-Tag Lim

    (Korea Institute of Science and Technology (KIST)
    KIST School, Korea University of Science and Technology)

Abstract

Quantum metrology can achieve enhanced sensitivity for estimating unknown parameters beyond the standard quantum limit. Recently, multiple-phase estimation exploiting quantum resources has attracted intensive interest for its applications in quantum imaging and sensor networks. For multiple-phase estimation, the amount of enhanced sensitivity is dependent on quantum probe states, and multi-mode N00N states are known to be a key resource for this. However, its experimental demonstration has been missing so far since generating such states is highly challenging. Here, we report generation of multi-mode N00N states and experimental demonstration of quantum enhanced multiple-phase estimation using the multi-mode N00N states. In particular, we show that the quantum Cramer-Rao bound can be saturated using our two-photon four-mode N00N state and measurement scheme using a 4 × 4 multi-mode beam splitter. Our multiple-phase estimation strategy provides a faithful platform to investigate multiple parameter estimation scenarios.

Suggested Citation

  • Seongjin Hong & Junaid ur Rehman & Yong-Su Kim & Young-Wook Cho & Seung-Woo Lee & Hojoong Jung & Sung Moon & Sang-Wook Han & Hyang-Tag Lim, 2021. "Quantum enhanced multiple-phase estimation with multi-mode N00N states," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25451-4
    DOI: 10.1038/s41467-021-25451-4
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