Are We Entering the Era of Quantum Telescopes? universetoday storybywill
The interferometer proposed by the BNL-led team borrows features from the Gottesman-Jennewein-Croke proposal and the“The proposal was to use a source of entangled photons and to employ correlations of photon counts in two stations and, therefore, to mostly remove the problem of photon phase stability. The intensity interferometers are used to measure the star diameters employing a technique based on the Hanbury Brown-Twiss effect of photon bunching.
The team is currently developing a physical description, said Nomerotski, that would include both options. This could be generalized to multiple stations and quantum protocols to process quantum information in a “noisy” environment. To test their concept, the team built a bench-top version of the two-photon interferometer that used a narrow spectral line in two argon lamps .
“There could be multiple scientific opportunities that would benefit from substantial improvements in astrometric precision. Just to list a few: testing theories of gravity by direct imaging of black hole accretion discs, precision parallax, and the cosmic distance ladder, mapping microlensing events, exoplanets, peculiar motions, dark matter, and others.
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