Augmenting the Sensing Performance of Entangled Photon Pairs through Asymmetry

Yoad Michael, Isaac Jonas, Leon Bello, Mallachi-Ellia Meller, Eliahu Cohen, Michael Rosenbluh, and Avi Pe’er
Phys. Rev. Lett. 127, 173603 – Published 19 October 2021
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Abstract

We analyze theoretically and experimentally cases of asymmetric detection, stimulation, and loss within a quantum nonlinear interferometer of entangled pairs. We show that the visibility of the SU(1,1) interference directly discerns between loss on the measured mode (signal) and the conjugated mode (idler). This asymmetry also affects the phase sensitivity of the interferometer, where coherent seeding is shown to mitigate losses that are suffered by the conjugated mode; therefore increasing the maximum threshold of loss that permits sub-shot-noise phase detection. Our findings can improve the performance of setups that rely on direct detection of entangled pairs, such as quantum interferometry and imaging with undetected photons.

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  • Received 5 June 2021
  • Revised 8 August 2021
  • Accepted 23 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.173603

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Yoad Michael, Isaac Jonas, Leon Bello, Mallachi-Ellia Meller, Eliahu Cohen, Michael Rosenbluh, and Avi Pe’er*

  • BINA Center for Nanotechnology, Bar-Ilan University, Ramat Gan, 5290002, Israel

  • *avi.peer@biu.ac.il

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Issue

Vol. 127, Iss. 17 — 22 October 2021

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