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- Central China Normal UniversityCN283 papers
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10 papers · 1 filter
Quantum optical metrology in the lossy and interferometers
Yang Gao
We study the phase sensitivity in the conventional and nonconventional interferometers with the coherent and squeezed vacuum input state via the quantum Cramer-Ra…
Quantum limits on detection sensitivity of a linear detector with feedback
Yang Gao
We show that the detection sensitivity of a linear detector is lower bounded by some quantum limits. For the force detection, relevant for atomic force microscopes, the lower bound…
Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection
Dong Li, Bryan T. Gard, Yang Gao +4
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 interferomet…
Quantum noise limit for force sensitivity of linear detectors
Yang Gao, Hopui Ho, Haixi Zhang
We prove that the force sensitivity of the conventional optomechanical detector associated with the optical quadrature measurement of the output beam is lower bounded by the so-cal…
Variational Limits for Phase Precision in Linear Quantum Optical Metrology
Yang Gao, Rumin Wang
We apply the variational method to obtain the universal and analytical lower bounds for parameter precision in some noisy systems. We first derive a lower bound for phase precision…
Bounds on Quantum Multiple-Parameter Estimation with Gaussian State
Yang Gao, Hwang Lee
We investigate the quantum Cramer-Rao bounds on the joint multiple-parameter estimation with the Gaussian state as a probe. We derive the explicit right logarithmic derivative and…