Active Reservoirs: nonequilibrium forces and transport

Active reservoirs refer to a special class of nonequilibrium reservoirs, which are made of self-propelled particles like bacteria or Janus beads. I will discuss two aspects of such reservoirs, starting from a microscopic descroption. The stationary relaxation dynamics of a harmonically trapped probe particle shows qualitatively different features from equilibrium. I will show that this can be attributed to an additional force, that emerges when the bath degrees are averaged over a NESS, conditioned to a certain probe position. In the second part, I will discuss what happens when two active reservoirs are connected by a harmonic chain, resulting in anomalous energy transport.

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