Development of quantum technologies for optical/infrared interferometry

• URL: http://arxiv.org/abs/2609.04311v1
• Date: Thu, 03 Sep 2026 18:00:00 GMT
• Title: Development of quantum technologies for optical/infrared interferometry
• Abstract summary: I propose quantum-sensing and quantum-networking applications.<n>I emphasize the practical constraints that must be overcome to make these capabilities useful for astronomy.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum technologies may revolutionize optical interferometry through new means to distribute and preserve electric-field amplitude and phase correlations between widely separated telescopes. After reviewing existing techniques, I survey proposed quantum-sensing and quantum-networking applications and highlight recent laboratory demonstrations of key building blocks. By easing field-transport demands for baselines beyond $\sim$1 km, quantum-enhanced interferometry could enable sub-milliarcsecond imaging and microarcsecond-class differential astrometry. That said, "going quantum" is not a magic shortcut to sensitivity because many of the most compelling science cases remain photon- and turbulence-limited. I therefore emphasize the practical constraints -- loss, bandwidth, coherence time, synchronization, and wavelength limits of quantum interfaces -- that must also be overcome to make these capabilities useful for astronomy, whether deployed on the ground or from space.

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