# Adaptive phase estimation with two-mode squeezed vacuum and parity measurement

@article{Huang2017AdaptivePE, title={Adaptive phase estimation with two-mode squeezed vacuum and parity measurement}, author={Zixin Huang and Keith R. Motes and P. Anisimov and J. Dowling and D. Berry}, journal={Physical Review A}, year={2017}, volume={95}, pages={053837} }

A proposed phase-estimation protocol based on measuring the parity of a two-mode squeezed-vacuum state at the output of a Mach-Zehnder interferometer shows that the Cram\'{e}r-Rao sensitivity is sub-Heisenberg [Phys.\ Rev.\ Lett.\ {\bf104}, 103602 (2010)]. However, these measurements are problematic, making it unclear if this sensitivity can be obtained with a finite number of measurements. This sensitivity is only for phase near zero, and in this region there is a problem with ambiguity… CONTINUE READING

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