7 papers
Hexatic Order Coupled with Thermal Noise Produces Bubbles in Two-Dimensional Active Matter
Luke Langford, Ahmad K. Omar
The phase separation of purely-repulsive particles induced by self-propulsion is among the most well-studied non-equilibrium phase transitions. However, some notable features of th…
The Mechanics of Nucleation and Growth and the Surface Tensions of Active Matter
Luke Langford, Ahmad K. Omar
Homogeneous nucleation, a textbook transition path for phase transitions, is typically understood on thermodynamic grounds through the prism of classical nucleation theory. However…
Multicomponent Linear Transport in the Absence of Local Equilibrium
Yu-Jen Chiu, Eric M. Weiner, Ahmad K. Omar
The linear laws of transport phenomena are central in our description of irreversible processes in systems across the physical sciences. Linear irreversible thermodynamics allows f…
Theory of Nonequilibrium Crystallization and the Phase Diagram of Active Brownian Spheres
Daniel Evans, Ahmad K. Omar
The crystallization of hard spheres at equilibrium is perhaps the most familiar example of an entropically-driven phase transition. In recent years, it has become clear that activi…
Theory of Nonequilibrium Coexistence with Coupled Conserved and Nonconserved Order Parameters
Daniel Evans, Ahmad K. Omar
Phase separation routinely occurs in both living and synthetic systems. These phases are often complex and distinguished by features including crystallinity, nematic order, and a h…
Theory of Nonequilibrium Multicomponent Coexistence
Yu-Jen Chiu, Daniel Evans, Ahmad K. Omar
Multicomponent phase separation is a routine occurrence in both living and synthetic systems. Thermodynamics provides a straightforward path to determine the phase boundaries that…