Performing homodyne detection at one port of squeezed-state light interferometer and then binarzing measurement data are important to achieve super-resolving and super-sensitive phase measurements. Here we propose a new data-processing technique by dividing the measurement quadrature into three bins (equivalent to a multi-outcome measurement), which leads to a higher improvement in the phase resolution and the phase sensitivity under realistic experimental condition. Furthermore, we develop a new phase-estimation protocol based on a combination of the inversion estimators of each outcome and show that the estimator can saturate the Cramer-Rao lower bound, similar to asymptotically unbiased maximum likelihood estimator.
@article{arxiv.1911.12912,
title = {Data processing over single-port homodyne detection to realize super-resolution and super-sensitivity},
author = {J. H. Xu and A. X. Chen and W. Yang and G. R. Jin1},
journal= {arXiv preprint arXiv:1911.12912},
year = {2020}
}