Noise sustained propagation: local versus global noise

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.