Today on arxiv, a blast from the past: Hamiltonian flocks! Some years ago we showed that this conservative model could support collective motion. In this preprint, I discuss how to properly couple the model to a bath and the effects of time-reversal symmetry in it! arxiv.org/abs/2604.02914
The fluctuation-dissipation theorem is a hallmark of equilibrium system that stem from their time-reversal symmetry. In many non-equilibrium systems, in particular active ones, extensions and explicit...
