Category: Physics

Summary: Testing whether a quasiperiodic wetting field arrests phase separation more strongly than comparable periodic substrate patterns during Cahn-Hilliard coarsening.

When a binary mixture separates into domains, patterned substrates can guide or hinder how those domains grow. This experiment asks whether a quasiperiodic wetting pattern creates a stronger form of frustration than simpler stripe or crossed-periodic patterns, especially near the finite-time window where coarsening is already close to arrest.

The simulation evolves Cahn-Hilliard dynamics on GPU hardware while comparing substrate geometries at matched amplitude. It measures late-time domain size, retained interface density, and orientational anisotropy to see whether quasiperiodic forcing keeps the structure finer and less directionally ordered than periodic forcing does.

That comparison targets a regime that appears less mapped than standard periodic-substrate studies. The value of the experiment is in treating quasiperiodicity as a distinct control on coarsening arrest and isotropy retention, rather than just another patterned boundary condition.

Method: GPU-accelerated Cahn-Hilliard simulations comparing quasiperiodic and periodic wetting fields near the finite-time coarsening-arrest window.

What is measured: Late-time domain size, interface density, orientational anisotropy, and crossover behavior between substrate-pattern regimes.