Classical and quantum noise in nonlinear optical systems |
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Authors: | Axel Schenzle |
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Institution: | (1) Sektion Physik der Universität München, D 8000 Munich, Federal Republic of Germany;(2) Max-Planck-Institut für Quantenoptik, D 8046 Garching, Federal Republic of Germany |
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Abstract: | In quantum optics noise plays an important role, since many of the nonlinear optical systems are quite sensitive to the subtle influences of weak random perturbations, being either classical of quantum mechanical in nature. We discuss the origin of quantum noise emerging from the reversible or the irreversible part of the dynamics and compare it with the properties of purely classical fluctuations. These general features are illustrated by a number of physical examples, such as the laser with loss or gain noise, nonlinear optical devices, and the phenomenon of quantum jumps. These processes have been chosen mainly to illustrate the different aspects of noise, but also because, to a large extent, they can be described in analytical terms. |
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Keywords: | Fokker-Planck equation GlauberP-representation positiveP-representation photon statistics sub-Poisson statistics squeezing |
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