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Coherence and anticoherence resonance tuned by noise
A M Lacasta1, F Sagués, J M Sancho
1Departament de Física Aplicada, Universitat Politècnica de Catalunya, Avenue Gregorio Marañon 44, E-08034 Barcelona, Spain.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 22, 2002
Summary
Noise can surprisingly induce anticoherence resonance in excitable systems, a phenomenon previously unpredicted. This discovery reveals new insights into system dynamics and noise interactions near oscillatory regimes.
Area of Science:
- Nonlinear dynamics
- Stochastic processes
- Excitable systems
Background:
- Coherence resonance (CR) enhances signal transmission in noisy systems.
- Previous analyses did not predict noise-induced anticoherence resonance.
Purpose of the Study:
- Investigate the phenomenon of anticoherence resonance induced by noise.
- Analyze the conditions and implications of this new resonance.
- Explore the relationship between anticoherence resonance and coherence resonance.
Main Methods:
- Numerical simulations of excitable systems.
- Theoretical analysis of system dynamics.
- Investigation of noise intensity effects.
Main Results:
- Identified anticoherence resonance occurring at very low noise intensities.
- Demonstrated that this phenomenon is a universal signature of non-monotonous relaxational behavior.
- Showed compatibility of anticoherence resonance with standard coherence resonance at intermediate noise levels.
Conclusions:
- Anticoherence resonance is a newly discovered phenomenon in noisy excitable systems.
- This resonance provides a universal signature for specific system dynamics.
- The interplay between different resonance phenomena under varying noise levels is significant.