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Is time a resource for quantum sensing? (Conference Presentation)
Author(s): Kae Nemoto; Michael Hanks

Paper Abstract

It is now widely believed that in the near future quantum sensing devices will be realized to outperform some of our current sensing devices. As quantum metrology protocols are comprised of three stages: probe state preparation, sensing followed by readout, it is important that the time for all three steps are accounted when the performance is determined. Historically the time required for the first and last stages has usually been neglected, which could be unrealistic when entangled resources are used. Entangled resources lose their sensitivity in time under noise, and hence the sensing time with these resources is limited. To avoid this degradation of sensitivity, we could repeat the protocol to refresh the entanglement in the resources. However, as the process of the preparation and the readout of the entangled probe state costs us a certain period of time, we need to optimize the sensing protocol throughout the three stages. We find that an entangled state probe can give an advantage over separable ones only if the entangled state preparation and readout times are lower than a certain threshold and illustrate this result in an optical setting.

Paper Details

Date Published: 10 September 2019
PDF
Proc. SPIE 11134, Quantum Communications and Quantum Imaging XVII, 1113408 (10 September 2019); doi: 10.1117/12.2529207
Show Author Affiliations
Kae Nemoto, National Institute of Informatics (Japan)
Michael Hanks, National Institute of Informatics (Japan)


Published in SPIE Proceedings Vol. 11134:
Quantum Communications and Quantum Imaging XVII
Keith S. Deacon, Editor(s)

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