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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Population monitoring and the quantum input-output formalism

JEFFERS, J and SHEPHERD, T J (1991) Population monitoring and the quantum input-output formalism. Lecture Notes in Economics and Mathematical Systems, 370. pp. 44-52. ISSN 0075-8442

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Abstract

The quantum Input-Output formalism of Gardiner and Collett is used to derive the rate equation describing the photoelectron counting statistics of an electromagnetic field output from a high-Q optical cavity. The evolution of the cavity field is assumed to be governed by an arbitrary Hamiltonian for a single mode of the field. The resulting equation is shown to conform with one previously derived on intuitive grounds, using purely population statistical arguments, As an explicit example, the solution for a freely-evolving cavity field is computed.