Clausius Relation for Active Particles: What Can We Learn from Fluctuations
AbstractMany kinds of active particles, such as bacteria or active colloids, move in a thermostatted fluid by means of self-propulsion. Energy injected by such a non-equilibrium force is eventually dissipated as heat in the thermostat. Since thermal fluctuations are much faster and weaker than self-propulsion forces, they are often neglected, blurring the identification of dissipated heat in theoretical models. For the same reason, some freedom—or arbitrariness—appears when defining entropy production. Recently three different recipes to define heat and entropy production have been proposed for the same model where the role of self-propulsion is played by a Gaussian coloured noise. Here we compare and discuss the relation between such proposals and their physical meaning. One of these proposals takes into account the heat exchanged with a non-equilibrium active bath: such an “active heat” satisfies the original Clausius relation and can be experimentally verified. View Full-Text
Share & Cite This Article
Puglisi, A.; Marini Bettolo Marconi, U. Clausius Relation for Active Particles: What Can We Learn from Fluctuations. Entropy 2017, 19, 356.
Puglisi A, Marini Bettolo Marconi U. Clausius Relation for Active Particles: What Can We Learn from Fluctuations. Entropy. 2017; 19(7):356.Chicago/Turabian Style
Puglisi, Andrea; Marini Bettolo Marconi, Umberto. 2017. "Clausius Relation for Active Particles: What Can We Learn from Fluctuations." Entropy 19, no. 7: 356.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.