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V V Belyi

Publications and source records attributed to V V Belyi.

2 recordsLinked to original sources
PubMed2004

Fluctuation-dissipation dispersion relation and quality factor for slow processes.

A generalization of the Callen-Welton formula for systems with slowly varying parameters is given. Using the momentum method and the time multiscale technique, it is shown that not only the dissipation but also the dispersive contributions determine the spectral function of the fluctuations in these systems. The general formalism is illustrated for an oscillating electrical circuit, and the influence of the dispersion contributions on the quality factor of the system is discussed.

Journal Article↗
PubMed2002

Fluctuation-dissipation relations for a nonlocal plasma.

A generalized version of the Callen-Welton fluctuation-dissipation formula that is nonlocal in space and time is derived. In a nonuniform plasma there appear significant differences between the fluctuations of the electrostatic field and those of the electron density, and the spatial inhomogeneities lead to an asymmetry with respect to the sign inversion of the frequency.

Journal Article↗