Active Rheology in Odd Viscosity Systems

Understand

Odd viscosity arises in systems with time reversal symmetry breaking, which creates non-dissipative effects.

• One method to probe changes in viscosity is to examine the dynamics of a single probe particle driven though a medium, a technique known as active rheology.
• We show that active rheology in a system with odd viscosity and no quenched disorder reveals a variety of novel effects, including a speed up of the probe particle with increasing system density when the background medium creates a velocity boost of the driven particle due to the Magnus effect.
• In contrast, the probe particle velocity in the dissipation-dominated limit monotonically decreases with increasing system density.