Transient Casimir Forces from Quenches in Thermal and Active Matter
Transient Casimir Forces from Quenches in Thermal and Active Matter
We compute fluctuation-induced (Casimir) forces for classical systems after a temperature quench. Using a generic coarse-grained model for fluctuations of a conserved density, we find that transient forces arise even if the initial and final states are force free. In setups reminiscent of Casimir (planar walls) and van der Waals …