2013/12/19 by Mehdi Ahmadi, David Edward Bruschi, Ivette Fuentes
Physics and Astronomy · #quant-ph #gr-qc
paper · pdf · doi:10.1103/physrevd.89.065028
published as Phys. Rev. D 89, 065028 (2014) · Ivette Fuentes previously published as I. Fuentes-Guridi and I. Fuentes-Schuller
arxiv created 2013/12/19 · arxiv updated 2014/03/26
In quantum metrology quantum properties such as squeezing and entanglement are exploited in the design of a new generation of clocks, sensors and other measurement devices that can outperform their classical counterparts. Applications of great technological relevance lie in the precise measurement of parameters which play a central role in relativity, such as proper accelerations, relative distances, time and gravitational field strengths. In this paper we generalise recently introduced techniques to estimate physical quantities within quantum field theory in flat and curved space-time. We consider a bosonic quantum field that undergoes a generic transformation, which encodes the parameter to be estimated. We present analytical formulas for optimal precision bounds on the estimation of small parameters in terms of Bogoliubov coefficients for single mode and two-mode Gaussian channels.