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Noise sustained propagation: local versus global noise
Locher1, Chatterjee, Marchesoni
1School of Physics, Georgia Institute of Technology, Atlanta 30332-0430, USA.
Summary
Optimal global noise levels enable reliable signal transmission in coupled bistable systems. This finding has implications for understanding signal propagation failure in cardiac tissue models.
Area of Science:
- Nonlinear dynamics
- Statistical physics
- Biophysics
Background:
- Signal propagation in coupled bistable elements is crucial for various physical and biological systems.
- Understanding the role of noise in signal transmission is essential for system reliability.
- Prior research established noise-supported propagation for local fluctuations.
Purpose of the Study:
- To investigate kink propagation in coupled bistable elements under local and global noise.
- To compare experimental and numerical results for kink propagation dynamics.
- To develop a theoretical framework for noise-supported signal propagation.
Main Methods:
- Experimental investigation of kink propagation in coupled bistable arrays.
- Numerical simulations of signal propagation with local and global noise.
- Development of a theoretical model based on discrete kink statistics.
Main Results:
- An optimal range of global noise power was identified for reliable signal transmission.
- Global noise, similar to local noise, can facilitate signal propagation up to a certain power.
- The developed theoretical framework accurately captures experimental and simulation observations.
Conclusions:
- Global noise can act as a beneficial factor for signal transmission in bistable systems within an optimal range.
- The findings provide insights into propagation failure mechanisms in biological tissues like cardiac tissue.
- A generalizable theoretical framework for discrete kink statistics offers a robust tool for analyzing bistable chains.
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