Optimal detection of ultra-broadband bi-photons with quantum nonlinear SU(1,1) interference
Nir Nechushtan, Han‐Zhong Zhang, Mallachi-Elia Meller, Avi Pe’er · Quantum Information and Measurement VI 2021 · 2021
SU(1,1) interference is a major tool for quantum detection of squeezed light. We optimize the interference visibility experimentally based on the phase matching and beam parameters. We demonstrate near-ideal visibility (loss-limited) over an octave bandwidth.