### Abstract

The reservoir can be modelled by an infinite array of beam splitters and the superposition of input fields in a lossless beam splitter can be described by the convolution of quasiprobability functions. We use the convolution relation and the beam splitter model to derive the Fokker-Planck equation for a system coupled with a phase-sensitive reservoir. Solving the Fokker-Planck equation, we test the coincidence of the loss of well-known nonclassical properties with the appearance of the positive well-defined Glauber-Sudarshan P function.

Original language | English |
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Pages (from-to) | 277-287 |

Number of pages | 11 |

Journal | Acta Physica Slovaca |

Volume | 46 |

Issue number | 3 |

Publication status | Published - Jun 1 1996 |

### ASJC Scopus subject areas

- Physics and Astronomy(all)

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## Cite this

Kim, M. S., Cho, K., Janszky, J., & Imoto, N. (1996). Quantum noise in amplification and attenuation.

*Acta Physica Slovaca*,*46*(3), 277-287.