Asymmetric target patterns in one-dimensional oscillatory media with genuine nonlocal coupling

Area of Science:

• Physical Chemistry
• Electrochemical Systems
• Chemical Kinetics

Background:

• Electrochemical systems exhibit complex dynamics.
• Pattern formation is a key phenomenon in reaction-diffusion systems.
• Asymmetric wave propagation is observed in various chemical and physical processes.

Purpose of the Study:

• To investigate the origin of self-organized asymmetric wave sources.
• To understand the role of nonlocal coupling in pattern formation.
• To validate simulation findings with experimental observations.

Main Methods:

• Experimental observation of asymmetric waves in a 1D electrochemical system (hydrogen oxidation reaction on Pt with poisons).
• Numerical simulations to model the system dynamics and identify key mechanisms.
• Comparison of experimental results with simulation outputs for regular and irregular wave variants.

Main Results:

• Observation of self-organized asymmetric wave sources in the studied electrochemical system.
• Identification of nonlocal migration coupling as essential for the persistence of asymmetry-inducing perturbations.
• Excellent agreement between experimental data and numerical simulations for both regular and irregular asymmetric waves.

Conclusions:

• Nonlocal coupling is a critical factor in generating and sustaining asymmetric wave patterns in electrochemical systems.
• The findings demonstrate the relevance of nonlocal coupling-induced patterns in physical systems.
• This study provides insights into the fundamental mechanisms governing pattern formation in complex chemical environments.