Abstract
We investigate the sensitivity and resolution of phase estimation in a Mach–Zehnder interferometer with photon-added two-mode squeezed vacuum states (PA-TMSVS) with a photon-number parity measurement scheme. Our results indicate that, when the phase to be estimated is small, the PA-TMSVS offers an improved phase resolution over both the two-mode squeezed vacuum and the photon-subtracted two-mode squeezed vacuum for a given initial squeezing level. In addition, we study the behavior of the quantum Fisher information of the PA-TMSVS, and show that the optimum phase uncertainty predicted by the corresponding Cramer–Rao bound can be achieved with a parity measurement.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Raul Carranza and Christopher C. Gerry
J. Opt. Soc. Am. B 29(9) 2581-2587 (2012)
Shuai Wang, Yaoting Wang, Liangjun Zhai, and Lijian Zhang
J. Opt. Soc. Am. B 35(5) 1046-1053 (2018)
Richard Birrittella and Christopher C. Gerry
J. Opt. Soc. Am. B 31(3) 586-593 (2014)