Bekele, Jemama (2007) Stochastic Resonance Due to Thermally Induced Noise in a Bistable Potential. Masters thesis, Addis Ababa University.
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PDF (Stochastic Resonance Due to Thermally Induced Noise in a Bistable Potential)
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Abstract
Stochastic resonance is an essentially nonlinear phenomenon, requiring the presence of an energetic activation barrier, a weak coherent input signal and a source of noise whereby generally feeble input information such as a weak signal can be amplifled and optimized by the assistance of noise. In order to study this phenomenon, we propose a model which enable us to convert a monostable potential to a bistable one through a mechanism called belowtorch efiect. Having successfully estabilshed the bistable potential, we consider motion of a Brownian particle subjected to random force describing noise and weak periodic force in a highly viscous non-homogenous medium and the bistable potential with spatially varying background temperature. We use a numerical technique to compute some of the observables (such as signal-to-noise-ratio and spectral ampliflcation) that are actually used to quantify stochastic resonance. The result shows that the response of the system undergoes resonance-like behavior as a function of hot temperature. The existence of this resonance-like behavior is still the identifying characteristic of the stochastic resonance phenomenon
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 13 Sep 2018 14:21 |
| Last Modified: | 13 Sep 2018 14:21 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5152 |
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