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We consider the dynamics of self-propelled particles subject to externaltorques. Two models for the reorientation of self-propulsion are considered,run-and-tumble particles, and active Brownian particles. Using the standardtools of non-equilibrium statistical mechanics we show that the run and tumbleparticles have a more robust response to torques. This macroscopic signature ofthe underlying reorientation statistics can be used to differentiate betweenthe two types of self propelled particles. Further this result might indicatethat run and tumble motion is indeed the evolutionarily stable dynamics forbacteria.

Effect of reorientation statistics on torque response of self propelled particles