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Covert sensing using floodlight illumination
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Gagatsos, Christos N., Bash, Boulat A., Datta, Animesh, Zhang, Zheshen and Guha, Saikat (2019) Covert sensing using floodlight illumination. Physical Review A, 99 (6). 062321 . doi:10.1103/physreva.99.062321 ISSN 1050-2947.
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WRAP-covert-sensing-floodlight-illumination-Datta-2019.pdf - Accepted Version - Requires a PDF viewer. Download (1345Kb) | Preview |
Official URL: https://doi.org/10.1103/physreva.99.062321
Abstract
We propose a scheme for covert active sensing using floodlight illumination from a terahertz-bandwidth amplified spontaneous emission (ASE) source and heterodyne detection. We evaluate the quantum-estimation-theoretic performance limit of covert sensing, wherein a transmitter's attempt to sense a target phase is kept undetectable to a quantum-equipped passive adversary, by hiding the signal photons under the thermal noise floor. Despite the quantum state of each mode of the ASE source being mixed (thermal), and hence inferior compared to the pure coherent state of a laser mode, the thousand-times-higher optical bandwidth of the ASE source results in achieving a substantially superior performance compared to a narrow-band laser source by allowing the probe light to be spread over many more orthogonal temporal modes within a given integration time. Even though our analysis is restricted to single-mode phase sensing, this system could be applicable or extendible for various practical optical sensing applications.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Detectors , Light amplifiers , Photons , Quantum theory, Quantum optics | ||||||||||||||||||
| Journal or Publication Title: | Physical Review A | ||||||||||||||||||
| Publisher: | American Physical Society | ||||||||||||||||||
| ISSN: | 1050-2947 | ||||||||||||||||||
| Official Date: | 18 June 2019 | ||||||||||||||||||
| Dates: |
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| Volume: | 99 | ||||||||||||||||||
| Number: | 6 | ||||||||||||||||||
| Article Number: | 062321 | ||||||||||||||||||
| DOI: | 10.1103/physreva.99.062321 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| Copyright Holders: | © 2019 American Physical Society | ||||||||||||||||||
| Date of first compliant deposit: | 21 October 2019 | ||||||||||||||||||
| Date of first compliant Open Access: | 21 October 2019 | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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