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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.12717 |
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| _version_ | 1866915796532330496 |
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| author | Kaiser, Robin Guerin, William Vakili, Farrokh Berger, Jean-Philippe Nomerotski, Andrei Kulkov, Sergei Svihra, Peter Santos, Eva Carlile, Colin Dravins, Dainis Funk, Stefan Saha, Prasenjit Walter, Roland Fernandes, Marcelo Borges Kim, Alex G. Dunsky, David Van Tilburg, Ken Baryakhtar, Masha Galanis, Marios Wagoner, Robert V. Dalal, Neal Huang, Junwu Gammie, Charles Murray, Norman W. |
| author_facet | Kaiser, Robin Guerin, William Vakili, Farrokh Berger, Jean-Philippe Nomerotski, Andrei Kulkov, Sergei Svihra, Peter Santos, Eva Carlile, Colin Dravins, Dainis Funk, Stefan Saha, Prasenjit Walter, Roland Fernandes, Marcelo Borges Kim, Alex G. Dunsky, David Van Tilburg, Ken Baryakhtar, Masha Galanis, Marios Wagoner, Robert V. Dalal, Neal Huang, Junwu Gammie, Charles Murray, Norman W. |
| contents | In this whitepaper, we outline how recent technological advances and ongoing developments open qualitatively new science opportunities in cosmology, fundamental physics, and quantum astrophysics. First, intensity interferometry can contribute to one of the most foundational observables in cosmology: the expansion rate of the Universe. Its angular resolution allows it to resolve the angular extent of extragalactic objects such as supernovae or quasars; combined with a physical scale local to the source, this yields an angular diameter distance and hence a 'Hubble diagram'. Second, the nature of dark matter can be probed via the astrometric lensing signatures of tiny dark matter halos. Third, intensity interferometry gives direct access to second-order coherence properties of astrophysical emission, opening a window onto genuinely quantum aspects of astrophysical light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_12717 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | ESO White Paper on Intensity Interferometry: Cosmology, Fundamental Physics, Quantum Optics Kaiser, Robin Guerin, William Vakili, Farrokh Berger, Jean-Philippe Nomerotski, Andrei Kulkov, Sergei Svihra, Peter Santos, Eva Carlile, Colin Dravins, Dainis Funk, Stefan Saha, Prasenjit Walter, Roland Fernandes, Marcelo Borges Kim, Alex G. Dunsky, David Van Tilburg, Ken Baryakhtar, Masha Galanis, Marios Wagoner, Robert V. Dalal, Neal Huang, Junwu Gammie, Charles Murray, Norman W. Instrumentation and Methods for Astrophysics In this whitepaper, we outline how recent technological advances and ongoing developments open qualitatively new science opportunities in cosmology, fundamental physics, and quantum astrophysics. First, intensity interferometry can contribute to one of the most foundational observables in cosmology: the expansion rate of the Universe. Its angular resolution allows it to resolve the angular extent of extragalactic objects such as supernovae or quasars; combined with a physical scale local to the source, this yields an angular diameter distance and hence a 'Hubble diagram'. Second, the nature of dark matter can be probed via the astrometric lensing signatures of tiny dark matter halos. Third, intensity interferometry gives direct access to second-order coherence properties of astrophysical emission, opening a window onto genuinely quantum aspects of astrophysical light. |
| title | ESO White Paper on Intensity Interferometry: Cosmology, Fundamental Physics, Quantum Optics |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2602.12717 |