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Given this unique advantage over the existing imaging schemes, it is now of utmost importance to understand its resolution limits, in particular what governs the maximal achievable spatial resolution. \nWe show both theoretically and experimentally that the momentum correlation between the detected and undetected photons governs the spatial resolution \u2014 a stronger correlation results in a higher resolution. In our experiment, the momentum correlation plays the dominating role in determining the resolution compared to the effect of diffraction. We find that the resolution is determined by the wavelength of the undetected light rather than the wavelength of the detected light. Our results thus show that it is in principle possible to obtain resolution characterized by a wavelength much shorter than the detected wavelength.<\/jats:p>","DOI":"10.22331\/q-2022-02-09-646","type":"journal-article","created":{"date-parts":[[2022,2,9]],"date-time":"2022-02-09T10:59:57Z","timestamp":1644404397000},"page":"646","update-policy":"https:\/\/doi.org\/10.22331\/q-crossmark-policy-page","source":"Crossref","is-referenced-by-count":46,"title":["Resolution of Quantum Imaging with Undetected Photons"],"prefix":"10.22331","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7099-1901","authenticated-orcid":false,"given":"Jorge","family":"Fuenzalida","sequence":"first","affiliation":[{"name":"Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna A-1090, Austria"},{"name":"Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, Boltzmanngasse 5, University of Vienna, Vienna A-1090, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Armin","family":"Hochrainer","sequence":"additional","affiliation":[{"name":"Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna A-1090, Austria"},{"name":"Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, Boltzmanngasse 5, University of Vienna, Vienna A-1090, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4901-0309","authenticated-orcid":false,"given":"Gabriela Barreto","family":"Lemos","sequence":"additional","affiliation":[{"name":"Instituto de F\u00edsica, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos 149, Rio de Janeiro, CP: 68528, Brazil"},{"name":"Physics Department, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston MA 02125, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4347-7971","authenticated-orcid":false,"given":"Evelyn A.","family":"Ortega","sequence":"additional","affiliation":[{"name":"Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna A-1090, Austria"},{"name":"Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, Boltzmanngasse 5, University of Vienna, Vienna A-1090, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7026-7275","authenticated-orcid":false,"given":"Radek","family":"Lapkiewicz","sequence":"additional","affiliation":[{"name":"Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw 02-093, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7768-424X","authenticated-orcid":false,"given":"Mayukh","family":"Lahiri","sequence":"additional","affiliation":[{"name":"Department of Physics, Oklahoma State University, Stillwater, Oklahoma, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6778-0887","authenticated-orcid":false,"given":"Anton","family":"Zeilinger","sequence":"additional","affiliation":[{"name":"Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna A-1090, Austria"},{"name":"Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, Boltzmanngasse 5, University of Vienna, Vienna A-1090, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"9598","published-online":{"date-parts":[[2022,2,9]]},"reference":[{"key":"0","doi-asserted-by":"publisher","unstructured":"C. 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