Ultimate precision: Gaussian parameter estimation in flat and curved spacetime

Autor(en)

Dominik Safranek, Jan Kohlrus, David Edward Bruschi, Antony R. Lee, Ivette Fuentes

Abstrakt

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. In realistic situations, however, probe states are mixed. In this paper, we provide a framework for the computation of optimal precision bounds for mixed single- and two-mode Gaussian states within quantum field theory. This enables the estimation of spacetime parameters in case the field states are initially at finite temperature.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

University of Nottingham, Universität Wien, Hebrew University Jerusalem

Anzahl der Seiten

11

Publikationsdatum

11-2015

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/6c1b845e-4d78-4f2a-a967-01a9cf05657c