Correlation functions and conditioned quantum dynamics in photodetection theory

Correlations in photodetection signals from quantum light sources are conventionally calculated by application of the source master equation and the quantum regression theorem. In this article we show how the conditioned dynamics, associated with the quantum theory of measurements, allows calculatio...

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Bibliographic Details
Published inPhysica scripta Vol. 90; no. 12; pp. 128004 - 8
Main Authors Xu, Qing, Greplova, Eliska, Julsgaard, Brian, Klaus Mølmer
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2015
Subjects
Conditioning
Correlation
Counting
Dynamics
field correlations
Mathematical analysis
Photons
quantum measurements
quantum optics
Quantum theory
Regression
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Summary:Correlations in photodetection signals from quantum light sources are conventionally calculated by application of the source master equation and the quantum regression theorem. In this article we show how the conditioned dynamics, associated with the quantum theory of measurements, allows calculations and offers interpretations of the behavior of the same quantities. Our theory is illustrated for photon counting and field-amplitude measurements, and we show, in particular, how transient correlations between field-amplitude measurements and later photon counting events can be accounted for by a recently developed theory of past quantum states of a monitored quantum system.
Bibliography:Royal Swedish Academy of Sciences
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ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/90/12/128004