A consistent quantum model for continuous photodetection processes

Abstract

We are modifying some aspects of the continuous photodetection theory, proposed by Srinivas and Davies [Optica Acta 28, 981 (1981)], which describes the non-unitary evolution of a quantum field state subjected to a continuous photocount measurement. In order to remedy inconsistencies that appear in their approach, we redefine the `annihilation' and `creation' operators that enter in the photocount superoperators. We show that this new approach not only still satisfies all the requirements for a consistent photocount theory according to Srinivas and Davies precepts, but also avoids some weird result appearing when previous definitions are used.

12 pages, 4 figures

References in corpus (5)

• Quantum Phase and Quantum Phase Operators: Some Physics and Some History
• Creating quanta with "annihilation" operator
• Two-mode Nonlinear Coherent States
• Factorisation of analytic representations in the unit disk and number-phase statistics of a quantum harmonic oscillator
• Controlling quantum entanglement through photocounts

Cited by in corpus (9)

• Converting Nonclassicality into Entanglement
• Microscopic models of quantum jump super-operators
• Engineering Quantum Jump Superoperators for Single Photon Detectors
• Inclusion of non-idealities in the continuous photodetection model
• Smooth quantum-classical transition in photon subtraction and addition processes
• Bipartite bound entanglement in continuous variables through deGaussification
• Coherent phase states in the coordinate and Wigner representations
• The Photodetection Process under the Conditions of an Imperfect Measurement Device
• Continuous photodetection model: quantum jump engineering and hints for experimental verification