{"id":45248,"date":"2020-08-12T16:01:00","date_gmt":"2020-08-12T13:01:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/researchers-develop-a-tool-for-characterizing-frequency-entangled-photon-pairs\/"},"modified":"2020-08-12T16:01:00","modified_gmt":"2020-08-12T13:01:00","slug":"researchers-develop-a-tool-for-characterizing-frequency-entangled-photon-pairs","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/researchers-develop-a-tool-for-characterizing-frequency-entangled-photon-pairs\/","title":{"rendered":"#Researchers develop a tool for characterizing frequency-entangled photon pairs"},"content":{"rendered":"

“#Researchers develop a tool for characterizing frequency-entangled photon pairs<\/strong>”<\/p>\n

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\"photon\"<\/img>
\n Credit: CC0 Public Domain
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Frequency-entangled photon pairs, an easily accessible type of entanglement, have been widely app<\/a>lied in fields like quantum-enhanced positioning and clock synchronization, and quantum spectroscopy.<\/p>\n

\n <\/section>\n

Recently, a research group led by Profs. Dong Ruifang and Zhang Shougang from the National Time Service Center (NTSC) of the Chinese Academy of Science<\/a>s has made a series<\/a> of progress in nonlocal dispersion cancelation (NDC) and wavelength-to-time mapping with frequency-entangled photon pairs. <\/p>\n

The researchers provided a full theoretical analysis and experimental examinations of the NDC characteristics for photon pairs with finite frequency entanglement. This offered an easily accessible tool for assessing and optimizing the NDC in various quantum information applications.
\nThey also developed a hybrid frequency-time spectrograph combining a tunable optical filter and a dispersive element, which could be used for spectral measurement of the two-photon state.
\nCompared with the previous single-photon spectrograph utilizing the dispersive Fourier transformation technique, this method avoids the need of additional wavelength calibration and the electronic laser trigger for coincidence measurement. Its application would be extended to continuous wave pumped two-photon sources.
\nFurthermore, the researchers explored the resolution limit on nonlocal wavelength-to-time mapping with entangled photon pairs.
\nThe results showed that the spectral bandwidth of the pump laser would become the dominated factor preventing the improvement of the spectral resolution when the involved group velocity dispersion (GVD) was large enough.
\nThis provides an excellent tool for characterizing the resolution of a nonlocal wavelength-to-time mapping for further quantum information applications.
\nResults were published in Optics Express<\/i> (Vol. 28, Issue 12), Optics Letters<\/i> (Vol. 45, Issue 11), and Optics Express<\/i> (Vol. 28, Issue 5), respectively.<\/p>\n

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More information:<\/strong>
\n Xiao Xiang et al. Quantification of nonlocal dispersion cancellation for finite frequency entanglement, Optics Express<\/i> (2020). DOI: 10.1364\/OE.390149<\/p>\n

Xiao Xiang et al. Hybrid frequency-time spectrograph for the spectral measurement of the two-photon state, Optics Letters<\/i> (2020). DOI: 10.1364\/OL.392744
\nYe Yang et al. Inherent resolution limit on nonlocal wavelength-to-time mapping with entangled photon pairs, Optics Express<\/i> (2020). DOI: 10.1364\/OE.387146<\/p><\/div>\n

\n Citation<\/strong>:
\n Researchers develop a tool for characterizing frequency-entangled photon pairs (2020, August 12)
\n retrieved 12 August 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-08-tool-characterizing-frequency-entangled-photon-pairs.html<\/p>\n

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“#Researchers develop a tool for characterizing frequency-entangled photon pairs” Credit: CC0 Public Domain Frequency-entangled photon pairs, an easily accessible type of entanglement, have been widely applied in fields like quantum-enhanced positioning and clock synchronization, and quantum spectroscopy. Recently, a research group led by Profs. Dong Ruifang and Zhang Shougang from the National Time Service Center…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[27496,52328],"class_list":["post-45248","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-optics-photonics-quantum-physics","tag-researchers-develop-a-tool-for-characterizing-frequency-entangled-photon-pairs"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/45248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=45248"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/45248\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=45248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=45248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=45248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}