Scott, H., Branford, D., Westerberg, N. , Leach, J. and Gauger, E. M. (2021) Noise limits on two-photon interferometric sensing. Physical Review A: Atomic, Molecular and Optical Physics, 104(5), 053704. (doi: 10.1103/PhysRevA.104.053704)
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Abstract
When a photon interferes with itself while traversing a Mach-Zehnder interferometer, the output port where it emerges is influenced by the phase difference between the interferometer arms. This allows for highly precise estimation of the path length difference (delay) but is extremely sensitive to phase noise. By contrast, a delay between the arms of the two-photon Hong-Ou-Mandel interferometer directly affects the relative indistinguishability of the photon pair, affecting the rate of recorded coincidences. This likewise allows for delay estimation, notably less precise but with the advantage of being less sensitive to perturbations of the photons' phase. Focusing on two-photon input states, we here investigate to what degree of noise Mach-Zehnder interferometry retains its edge over Hong-Ou-Mandel interferometry. We also explore the competing benefits of different two-photon inputs for a Mach-Zehnder interferometer and under what parameter regimes each input performs best.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was supported by UK EPSRC Grants EP/R030413/1 and EP/T00097X/1. NW wishes to acknowledge support from the Royal Commission for the Exhibition of 1851. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Leach, Mr Jonathan and Westerberg, Dr Niclas |
| Authors: | Scott, H., Branford, D., Westerberg, N., Leach, J., and Gauger, E. M. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review A: Atomic, Molecular and Optical Physics |
| Publisher: | American Physical Society |
| ISSN: | 2469-9926 |
| ISSN (Online): | 2469-9934 |
| Published Online: | 09 November 2021 |
| Copyright Holders: | Copyright © 2021 American Physical Society |
| First Published: | First published in Physical Review A: Atomic, Molecular and Optical Physics 104(5): 053704 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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