Quantum illumination versus coherent-state target detection
Entanglement is arguably the key quantum-mechanical resource for improving the performance of communication, precision measurement and computing systems beyond their classical-physics limits. Yet entanglement is fragile, being very susceptible to destruction by the decoherence arising from loss and...
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| Format: | Article |
| Language: | en_US |
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Institute of Physics Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/70498 https://orcid.org/0000-0002-6094-5861 |
| _version_ | 1826208036341940224 |
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| author | Shapiro, Jeffrey H. Lloyd, Seth |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Shapiro, Jeffrey H. Lloyd, Seth |
| author_sort | Shapiro, Jeffrey H. |
| collection | MIT |
| description | Entanglement is arguably the key quantum-mechanical resource for improving the performance of communication, precision measurement and computing systems beyond their classical-physics limits. Yet entanglement is fragile, being very susceptible to destruction by the decoherence arising from loss and noise. Surprisingly, Lloyd (2008 Science 321 1463) recently proved that a very large performance gain accrues from use of entanglement in single-photon target detection within an entanglement-destroying lossy, noisy environment when compared to what can be achieved with unentangled single-photon states. We extend Lloyd's analysis to the full multiphoton input Hilbert space. We show that the performance of Lloyd's single-photon'quantum illumination' system is, at best, equal to that of a coherent-state transmitter of the same average photon number, and may be substantially worse. We demonstrate that the coherent-state system derives its advantage from the coherence between a sequence of weak—single photon on average—transmissions, a possibility that was not allowed for in Lloyd's work. Nevertheless, as shown by Tan et al (2008 Phys. Rev. Lett. 101 253601), quantum illumination may offer a significant, although more modest, performance gain when operation is not limited to the single-photon regime. |
| first_indexed | 2024-09-23T13:59:23Z |
| format | Article |
| id | mit-1721.1/70498 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:59:23Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | mit-1721.1/704982022-09-28T17:31:43Z Quantum illumination versus coherent-state target detection Shapiro, Jeffrey H. Lloyd, Seth Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Research Laboratory of Electronics Lloyd, Seth Lloyd, Seth Shapiro, Jeffrey H. Entanglement is arguably the key quantum-mechanical resource for improving the performance of communication, precision measurement and computing systems beyond their classical-physics limits. Yet entanglement is fragile, being very susceptible to destruction by the decoherence arising from loss and noise. Surprisingly, Lloyd (2008 Science 321 1463) recently proved that a very large performance gain accrues from use of entanglement in single-photon target detection within an entanglement-destroying lossy, noisy environment when compared to what can be achieved with unentangled single-photon states. We extend Lloyd's analysis to the full multiphoton input Hilbert space. We show that the performance of Lloyd's single-photon'quantum illumination' system is, at best, equal to that of a coherent-state transmitter of the same average photon number, and may be substantially worse. We demonstrate that the coherent-state system derives its advantage from the coherence between a sequence of weak—single photon on average—transmissions, a possibility that was not allowed for in Lloyd's work. Nevertheless, as shown by Tan et al (2008 Phys. Rev. Lett. 101 253601), quantum illumination may offer a significant, although more modest, performance gain when operation is not limited to the single-photon regime. W. M. Keck Foundation (Center for Extreme Quantum Information Theory) United States. Defense Advanced Research Projects Agency (Quantum Sensors Program) 2012-05-04T15:03:33Z 2012-05-04T15:03:33Z 2009-06 2009-02 Article http://purl.org/eprint/type/JournalArticle 1367-2630 http://hdl.handle.net/1721.1/70498 Shapiro, Jeffrey H, and Seth Lloyd. “Quantum Illumination Versus Coherent-state Target Detection.” New Journal of Physics 11.6 (2009): 063045. Web. https://orcid.org/0000-0002-6094-5861 en_US http://dx.doi.org/10.1088/1367-2630/11/6/063045 New Journal of Physics Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf Institute of Physics Publishing New Journal of Physics |
| spellingShingle | Shapiro, Jeffrey H. Lloyd, Seth Quantum illumination versus coherent-state target detection |
| title | Quantum illumination versus coherent-state target detection |
| title_full | Quantum illumination versus coherent-state target detection |
| title_fullStr | Quantum illumination versus coherent-state target detection |
| title_full_unstemmed | Quantum illumination versus coherent-state target detection |
| title_short | Quantum illumination versus coherent-state target detection |
| title_sort | quantum illumination versus coherent state target detection |
| url | http://hdl.handle.net/1721.1/70498 https://orcid.org/0000-0002-6094-5861 |
| work_keys_str_mv | AT shapirojeffreyh quantumilluminationversuscoherentstatetargetdetection AT lloydseth quantumilluminationversuscoherentstatetargetdetection |