Ultimate precision: Gaussian parameter estimation in flat and curved spacetime

Understand

Relativistic quantum metrology provides an optimal strategy for the estimation of parameters encoded in quantum fields in flat and curved spacetime.

• These parameters usually correspond to physical quantities of interest such as proper times, accelerations, gravitational field strengths, among other spacetime parameters.
• The precise estimation of these parameters can lead to novel applications in gravimeters, spacetime probes and gravitational wave detectors.
• Previous work in this direction only considered pure probe states.