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Noise induced propagation in monostable media
A A Zaikin1, J García-Ojalvo, L Schimansky-Geier
1Institut für Physik, Potsdam Universität, Am Neuen Palais 10, D-14469 Potsdam, Germany.
Physical Review Letters
|January 22, 2002
Summary
External fluctuations can drive harmonic signals through monostable media. This occurs via doubly stochastic resonance, where noise and coupling create bistability, enabling signal propagation.
Area of Science:
- Nonlinear dynamics
- Complex systems
- Stochastic resonance
Background:
- Monostable media typically do not propagate signals without external forcing.
- External fluctuations can alter the dynamics of nonlinear systems.
- Stochastic resonance is a phenomenon where noise enhances signal detection.
Purpose of the Study:
- To demonstrate noise-induced signal propagation in monostable media.
- To investigate the role of doubly stochastic resonance in signal transmission.
- To quantify this phenomenon in a model system.
Main Methods:
- Theoretical analysis of signal propagation under noise.
- Numerical simulations of coupled nonlinear electronic circuits.
- Investigation of the effects of multiplicative and additive noise.
Main Results:
- External fluctuations can induce harmonic signal propagation in monostable media.
- Doubly stochastic resonance, involving multiplicative and additive noise, is key.
- Optimal noise intensities are required for efficient signal propagation.
- The phenomenon was successfully modeled and quantified in coupled electronic circuits.
Conclusions:
- Noise can be harnessed to achieve signal propagation in systems not designed for it.
- Doubly stochastic resonance offers a mechanism for signal transmission in extended nonlinear media.
- This finding has potential implications for signal processing and information transfer in complex systems.
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