Document Type
Article
Publication Date
12-19-2016
Abstract
We theoretically investigate the phase sensitivity with parity detection on an SU(1,1) interferometer with a coherent state combined with a squeezed vacuum state. This interferometer is formed with two parametric amplifiers for beam splitting and recombination instead of beam splitters. We show that the sensitivity of phase estimation approaches the Heisenberg limit and give the corresponding optimal condition. Moreover, we derive the quantum Cramér-Rao bound of the SU(1,1) interferometer.
Publication Source (Journal or Book title)
Physical Review A
Recommended Citation
Li, D., Gard, B., Gao, Y., Yuan, C., Zhang, W., Lee, H., & Dowling, J. (2016). Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection. Physical Review A, 94 (6) https://doi.org/10.1103/PhysRevA.94.063840