Quantum limits of covert target detection
In covert target detection, Alice attempts to send optical or microwave probes to determine the presence or absence of a weakly-reflecting target embedded in thermal background radiation within a target region, while striving to remain undetected by an adversary, Willie, who is co-located with th...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/180461 |
| _version_ | 1826127366922960896 |
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| author | Tham, Guo Yao Nair, Ranjith Gu, Mile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Tham, Guo Yao Nair, Ranjith Gu, Mile |
| author_sort | Tham, Guo Yao |
| collection | NTU |
| description | In covert target detection, Alice attempts to send optical or microwave
probes to determine the presence or absence of a weakly-reflecting target
embedded in thermal background radiation within a target region, while striving
to remain undetected by an adversary, Willie, who is co-located with the target
and collects all light that does not return to Alice. We formulate this problem
in a realistic setting and derive quantum-mechanical limits on Alice's error
probability performance in entanglement-assisted target detection for any fixed
level of her detectability by Willie. We demonstrate how Alice can approach
this performance limit using two-mode squeezed vacuum probes in the regime of
small to moderate background brightness, and how such protocols can outperform
any conventional approach using Gaussian-distributed coherent states. In
addition, we derive a universal performance bound for non-adversarial quantum
illumination without requiring the passive-signature assumption. |
| first_indexed | 2025-03-09T14:32:48Z |
| format | Journal Article |
| id | ntu-10356/180461 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T14:32:48Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1804612024-10-08T05:07:30Z Quantum limits of covert target detection Tham, Guo Yao Nair, Ranjith Gu, Mile School of Physical and Mathematical Sciences Centre for Quantum Technologies, NUS Nanyang Quantum Hub MajuLab, CNRS-UNS-NUS-NTU, International Joint Research Unit, UMI 3654 Physics Optical probe Quantum limit In covert target detection, Alice attempts to send optical or microwave probes to determine the presence or absence of a weakly-reflecting target embedded in thermal background radiation within a target region, while striving to remain undetected by an adversary, Willie, who is co-located with the target and collects all light that does not return to Alice. We formulate this problem in a realistic setting and derive quantum-mechanical limits on Alice's error probability performance in entanglement-assisted target detection for any fixed level of her detectability by Willie. We demonstrate how Alice can approach this performance limit using two-mode squeezed vacuum probes in the regime of small to moderate background brightness, and how such protocols can outperform any conventional approach using Gaussian-distributed coherent states. In addition, we derive a universal performance bound for non-adversarial quantum illumination without requiring the passive-signature assumption. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) This work is supported by the Singapore Ministry of Education Tier 2 Grant No. T2EP50221-0014, the Singapore Ministry of Education Tier1 Grants No. RG77/22 and No. RT4/23, the Agency for Science, Technology and Research (A*STAR) under its QEP2.0 program (NRF2021-QEP2- 02-P06), and FQxI under Grant No. FQXi-RFP-IPW1903 (“Are quantum agents more energetically efficient at making predictions?”) from the Foundational Questions Institute and Fetzer Franklin Fund (a donor-advised fund of Silicon Valley Community Foundation). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of the National Research Foundation or the Ministry of Education, Singapore. 2024-10-08T05:07:29Z 2024-10-08T05:07:29Z 2024 Journal Article Tham, G. Y., Nair, R. & Gu, M. (2024). Quantum limits of covert target detection. Physical Review Letters, 133(11), 110801-. https://dx.doi.org/10.1103/PhysRevLett.133.110801 0031-9007 https://hdl.handle.net/10356/180461 10.1103/PhysRevLett.133.110801 133 2-s2.0-85203876221 11 133 110801 en T2EP50221-0014 RG77/22 RT4/23 NRF2021-QEP2-02-P06 Physical Review Letters © 2024 American Physical Society. All rights reserved. |
| spellingShingle | Physics Optical probe Quantum limit Tham, Guo Yao Nair, Ranjith Gu, Mile Quantum limits of covert target detection |
| title | Quantum limits of covert target detection |
| title_full | Quantum limits of covert target detection |
| title_fullStr | Quantum limits of covert target detection |
| title_full_unstemmed | Quantum limits of covert target detection |
| title_short | Quantum limits of covert target detection |
| title_sort | quantum limits of covert target detection |
| topic | Physics Optical probe Quantum limit |
| url | https://hdl.handle.net/10356/180461 |
| work_keys_str_mv | AT thamguoyao quantumlimitsofcoverttargetdetection AT nairranjith quantumlimitsofcoverttargetdetection AT gumile quantumlimitsofcoverttargetdetection |