Making Jamming more Attractive

Numerical and theoretical studies of jamming presume that particles are purely repulsive. In fact emulsion droplets, foam bubbles, and powders typically experience weak cohesive forces. Understanding the consequences of this weak attractive interaction is therefore necessary in order to interpret experimental studies of jamming. I will present the results of simulations of non-Brownian soft spheres with a finite-ranged attractive tail in their pair potential. The distance to the attractive jamming transition can be controlled by systematically varying both packing fraction and the range of the attractive tail. By measuring elastic moduli and identifying rigid clusters using the pebble game, I will demonstrate that attractive jamming displays features reminiscent of both repulsive jamming and rigidity percolation, but lies in a different universality class.