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Entanglement-free Heisenberg-limited phase estimation

Author

Listed:
  • B. L. Higgins

    (Centre for Quantum Dynamics, Griffith University)

  • D. W. Berry

    (Centre for Quantum Computer Technology, Macquarie University)

  • S. D. Bartlett

    (School of Physics, University of Sydney)

  • H. M. Wiseman

    (Centre for Quantum Dynamics, Griffith University
    Centre for Quantum Computer Technology, Griffith University)

  • G. J. Pryde

    (Centre for Quantum Dynamics, Griffith University)

Abstract

Heisenberg's the limit At the fundamental level, measurement precision is limited by the number of quantum resources (such as photons) involved, and standard phase measurement schemes lead to an uncertainty (the standard quantum limit) that scales with this number. In theory, it should be possible to achieve a precision limited only by the Heisenberg uncertainty principle. A few experiments have beaten the standard quantum limit, but none have achieved Heisenberg-limited scaling until now, largely due to the need for difficult-to-generate exotic quantum entangled states. Higgins et al. adopted an alternative approach using unentangled single-photon states, allowing them to achieve Heisenberg-limited phase estimation. This marks a drastic reduction in the complexity of achieving quantum-enhanced measurement precision.

Suggested Citation

  • B. L. Higgins & D. W. Berry & S. D. Bartlett & H. M. Wiseman & G. J. Pryde, 2007. "Entanglement-free Heisenberg-limited phase estimation," Nature, Nature, vol. 450(7168), pages 393-396, November.
    • Handle: RePEc:nat:nature:v:450:y:2007:i:7168:d:10.1038_nature06257
    DOI: 10.1038/nature06257
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    Cited by:

    1. Muhammad Junaid Umer & Muhammad Imran Sharif, 2022. "A Comprehensive Survey on Quantum Machine Learning and Possible Applications," International Journal of E-Health and Medical Communications (IJEHMC), IGI Global, vol. 13(5), pages 1-17, October.
    2. Berrada, K. & Abdel-Khalek, S. & Khalil, E.M. & Alkaoud, A. & Eleuch, H., 2022. "Entanglement and Fisher information for a two-atom system interacting with deformed fields in correlated two-mode states," Chaos, Solitons & Fractals, Elsevier, vol. 164(C).

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