2018/09/10 by Emil T. Khabiboulline, Johannes Borregaard, Kristiaan De Greve +1 · 1 voice
Physics and Astronomy · #astro-ph.IM #quant-ph
paper · pdf · doi:10.1103/physreva.100.022316
published as Phys. Rev. A 100, 022316 (2019) · 10 pages, 8 figures; v2 - clarifications and references; v3 - close to published version
arxiv published 2018/09/10 · arxiv created 2019/08/28 · arxiv updated 2019/08/30
Quantum networks provide a platform for astronomical interferometers capable of imaging faint stellar objects. In a recent work [arXiv:1809.01659], we presented a protocol that circumvents transmission losses with efficient use of quantum resources and modest quantum memories. Here we analyze a number of extensions to that scheme. We show that it can be operated as a truly broadband interferometer and generalized to multiple sites in the array. We also analyze how imaging based on the quantum Fourier transform provides improved signal-to-noise ratio compared to classical processing. Finally, we discuss physical realizations including photon-detection-based quantum state transfer.