Two-mode Gaussian product states in a Lossy Interferometer

2016/08/29 by Jaseem, Noufal, Shaji, Anil
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.1608.07966

Abstract

The quantum Fisher information for a two-mode, Gaussian product state in an interferometer subject to photon loss is studied. We obtain the quantum Cramer-Rao bound on the achievable precision in phase estimation using such states. The scaling of the measurement precision with the mean photon number for such input product states is compared to the limited scaling for dual squeezed vacuum states and for dual squeezed, displaced vacuum states.

Related

• Two-parameter estimation with single squeezed-light interferometer via double homodyne detection
• Ultimate precision limit of SU(2) and SU(1,1) interferometers in noisy metrology
• General Cramér-Rao bound for parameter estimation using Gaussian multimode quantum resources
• Holevo Cramér-Rao bound for multi-parameter estimation in nonlinear interferometers
• Phase sensitivity via photon-subtraction operations inside Mach-Zehnder interferometer