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Klaus Mølmer

Bayesian parameter estimation by continuous homodyne detection

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We simulate the process of continuous homodyne detection of the radiative emission from a quantum system, and we investigate how a Bayesian analysis can be employed to determine unknown parameters that govern the system evolution. Measurement backaction quenches the system dynamics at all times and we show that the ensuing transient evolution is more sensitive to system parameters than the steady state of the system. The parameter sensitivity can be quantified by the Fisher information, and we investigate numerically and analytically how the temporal noise correlations in the measurement signal contribute to the ultimate sensitivity limit of homodyne detection.

OriginalsprogEngelsk
Artikelnummer032103
TidsskriftPhysical Review A
Vol/bind94
Nummer3
Antal sider9
ISSN2469-9926
DOI
StatusUdgivet - 6 sep. 2016

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