Lost photon enhances superresolution
Abstract Quantum imaging can beat classical resolution limits, imposed by the diffraction of light. In particular, it is known that one can reduce the image blurring and increase the achievable resolution by illuminating an object by entangled light and measuring coincidences of photons. If an n-pho...
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Nature Portfolio
2021
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oai:doaj.org-article:cbdd7d654c054052aa8fb531ce3db04f2021-12-02T16:27:54ZLost photon enhances superresolution10.1038/s41534-021-00465-42056-6387https://doaj.org/article/cbdd7d654c054052aa8fb531ce3db04f2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00465-4https://doaj.org/toc/2056-6387Abstract Quantum imaging can beat classical resolution limits, imposed by the diffraction of light. In particular, it is known that one can reduce the image blurring and increase the achievable resolution by illuminating an object by entangled light and measuring coincidences of photons. If an n-photon entangled state is used and the nth-order correlation function is measured, the point-spread function (PSF) effectively becomes $$\sqrt{n}$$ n times narrower relatively to classical coherent imaging. Quite surprisingly, measuring n-photon correlations is not the best choice if an n-photon entangled state is available. We show that for measuring (n − 1)-photon coincidences (thus, ignoring one of the available photons), PSF can be made even narrower. This observation paves a way for a strong conditional resolution enhancement by registering one of the photons outside the imaging area. We analyze the conditions necessary for the resolution increase and propose a practical scheme, suitable for observation and exploitation of the effect.A. B. MikhalychevP. I. NovikI. L. KaruseichykD. A. LyakhovD. L. MichelsD. S. MogilevtsevNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-10 (2021) |
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DOAJ |
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Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 |
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Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 A. B. Mikhalychev P. I. Novik I. L. Karuseichyk D. A. Lyakhov D. L. Michels D. S. Mogilevtsev Lost photon enhances superresolution |
| description |
Abstract Quantum imaging can beat classical resolution limits, imposed by the diffraction of light. In particular, it is known that one can reduce the image blurring and increase the achievable resolution by illuminating an object by entangled light and measuring coincidences of photons. If an n-photon entangled state is used and the nth-order correlation function is measured, the point-spread function (PSF) effectively becomes $$\sqrt{n}$$ n times narrower relatively to classical coherent imaging. Quite surprisingly, measuring n-photon correlations is not the best choice if an n-photon entangled state is available. We show that for measuring (n − 1)-photon coincidences (thus, ignoring one of the available photons), PSF can be made even narrower. This observation paves a way for a strong conditional resolution enhancement by registering one of the photons outside the imaging area. We analyze the conditions necessary for the resolution increase and propose a practical scheme, suitable for observation and exploitation of the effect. |
| format |
article |
| author |
A. B. Mikhalychev P. I. Novik I. L. Karuseichyk D. A. Lyakhov D. L. Michels D. S. Mogilevtsev |
| author_facet |
A. B. Mikhalychev P. I. Novik I. L. Karuseichyk D. A. Lyakhov D. L. Michels D. S. Mogilevtsev |
| author_sort |
A. B. Mikhalychev |
| title |
Lost photon enhances superresolution |
| title_short |
Lost photon enhances superresolution |
| title_full |
Lost photon enhances superresolution |
| title_fullStr |
Lost photon enhances superresolution |
| title_full_unstemmed |
Lost photon enhances superresolution |
| title_sort |
lost photon enhances superresolution |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/cbdd7d654c054052aa8fb531ce3db04f |
| work_keys_str_mv |
AT abmikhalychev lostphotonenhancessuperresolution AT pinovik lostphotonenhancessuperresolution AT ilkaruseichyk lostphotonenhancessuperresolution AT dalyakhov lostphotonenhancessuperresolution AT dlmichels lostphotonenhancessuperresolution AT dsmogilevtsev lostphotonenhancessuperresolution |
| _version_ |
1718384017387028480 |