A consistent quantum model for continuous photodetection processes

Details A consistent quantum model for continuous photodetection processes A consistent quantum model for continuous photodetection processes

2003-07-11

arxiv.org/abs/quant-ph/0307089v1

J. Opt. B: Quantum Semiclass. Opt. 5, S271 (2003)

Physics

Quantum Physics

12 pages, 4 figures

Scientific paper

10.1088/1464-4266/5/3/358

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.

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