1/f noise in systems showing stochastic resonance

Stochastic resonator systems with input and/or output 1/f noise have been studied. Disordered magnets/dielectrics serve as examples for the case of output 1/f noise with white noise (thermal excitation) at the input of the resonators. Due to the fluctuation-dissipation theorem, the output noise is r...

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Bibliographic Details
Main Authors: Kiss, L.B., Gingl, Z., Marton, Z., Kertsez, J., Moss, F., Schmera, G., Bulsara, A.
Format: Conference Proceeding
Language:English
Subjects:
664100 > Theory of Electronic Structure of Atoms & Molecules-- (1992-)
ANGULAR MOMENTUM
ATOMIC AND MOLECULAR PHYSICS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DIELECTRIC MATERIALS
ELECTRONIC EQUIPMENT
HARMONICS
HOLES
MAGNETS
MATERIALS
MATHEMATICAL MODELS
NOISE
NONLINEAR OPTICS
OPTICS
OSCILLATIONS
PARTICLE PROPERTIES 661300 > Other Aspects of Physical Science-- (1992-)
RESONATORS
SIGNAL-TO-NOISE RATIO
SPECTRA
SPIN
STATISTICAL MODELS
STOCHASTIC PROCESSES
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Summary:Stochastic resonator systems with input and/or output 1/f noise have been studied. Disordered magnets/dielectrics serve as examples for the case of output 1/f noise with white noise (thermal excitation) at the input of the resonators. Due to the fluctuation-dissipation theorem, the output noise is related to the out-of-phase component of the periodic peak of the output spectrum. Spin glasses and ferromagnets serve as interesting examples of coupled stochastic resonators. A proper coupling can lead to an extremely large signal-to-noise ratio. As a model system, a 1/f-noise-driven Schmitt trigger has been investigated experimentally to study stochastic resonance with input 1/f noise. Under proper conditions, the authors have found several new nonlinearity effects, such as peaks at even harmonics, holes at even harmonics, and 1/f noise also in the output spectrum. 33 refs., 8 figs.
ISSN:0022-4715
1572-9613