How It Works
Particles on a grid align their heading with neighbors. Species A aligns with B, but B anti-aligns with A. This non-reciprocity creates chasing dynamics. Each particle has a heading that biases its random walk, and aligns with local majority via a discrete Ising-like rule.
Applications
Models active matter with non-reciprocal coupling, predator-prey dynamics, motility-induced phase separation. Shows phases not seen in standard Vicsek flocking, including spontaneous interface pinning and traveling excitations.
coupling controls non-reciprocity strength·noise adds randomness to alignment·density controls particle count