University of Sussex
Browse
Knott2014a.pdf (239.65 kB)

Attaining subclassical metrology in lossy systems with entangled coherent states

Download (239.65 kB)
journal contribution
posted on 2023-06-08, 17:20 authored by P A Knott, W J Munro, Jacob DunninghamJacob Dunningham
Quantum mechanics allows entanglement enhanced measurements to be performed, but loss remains an obstacle in constructing realistic quantum metrology schemes. However, recent work has revealed that entangled coherent states (ECSs) have the potential to perform robust subclassical measurements [J. Joo et al., Phys. Rev. Lett. 107, 083601 (2011)]. Up to now no read-out scheme has been devised that exploits this robust nature of ECSs, but we present here an experimentally accessible method of achieving precision close to the theoretical bound, even with loss.We show substantial improvements over unentangled classical states and highly entangled NOON states for a wide range of loss values, elevating quantum metrology to a realizable technology in the near future.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review A

ISSN

1050-2947

Publisher

American Physical Society

Volume

89

Page range

053812

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2014-05-18

First Open Access (FOA) Date

2014-05-18

First Compliant Deposit (FCD) Date

2014-05-18

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC