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Title: Towards quantum telescopes: demonstration of a two-photon interferometer for precision astrometry

Journal Article · · Optics Express
DOI: https://doi.org/10.1364/OE.486342 · OSTI ID:2229776

Classical optical interferometry requires maintaining live, phase-stable links between telescope stations. This requirement greatly adds to the cost of extending to long baseline separations and limits on baselines will in turn limit the achievable angular resolution. Here we describe a novel type of two-photon interferometer for astrometry, which uses photons from two separate sky sources and does not require an optical link between stations. Such techniques may make large increases in interferometric baselines practical, even by orders of magnitude, with a corresponding improvement in astrometric precision benefiting numerous fields in astrophysics. We tested a benchtop analogue version of the two-source interferometer and unambiguously observe correlated behavior in detections of photon pairs from two thermal light sources, in agreement with theoretical predictions. This work opens new possibilities in future astronomical measurements.

Sponsoring Organization:
USDOE
OSTI ID:
2229776
Alternate ID(s):
OSTI ID: 2311083
Journal Information:
Optics Express, Journal Name: Optics Express Journal Issue: 26 Vol. 31; ISSN 1094-4087; ISSN OPEXFF
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

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