Quantum-Assisted Optical Interferometry for Precision Astrometry

The highest resolutions in astronomical imaging are achieved through interferometry, the process of combining wave information from multiple separate telescopes/apertures. We review the standard techniques of single-photon amplitude (Michelson) interferometry and two-photon (Hanbury Brown & Twiss) intensity interferometry, and then visit recent ideas for how they can be improved in the optical through the use of quantum networking and entanglement distribution. A proposed new technique of two-photon amplitude interferometry is described, with particular application for precision astrometry. First bench-top results will be shown and basic instrument requirements discussed, along with future improvements for detector systems and quantum methods.