Laboratoire de Physique Théorique

de la Matière Condensée

Jordan Horowitz (University of Michigan)

Nonequilibrium thermodynamic limits to fluctuations and response


(Egalement par zoom
Meeting ID: 870 2843 9751
Passcode: 317775)


Thermodynamics is a remarkably successful theoretical framework, with wide ranging applications across the natural sciences. Unfortunately, thermodynamics is limited to equilibrium or near-equilibrium situations, whereas most of the natural world, especially life, operates very far from thermodynamic equilibrium. Research in nonequilibrium statistical thermodynamics is beginning to shed light on this domain. In this talk, I will present a collection of such predictions, namely a series of equalities and inequalities---akin to the Fluctuation-Dissipation theorem but valid arbitrarily far from equilibrium---that link a system’s response to the strength of nonequilibrium driving.  These results open new avenues for experimentally characterizing nonequilibrium response and suggest design-principles for high-sensitivity, low-noise devices.  I will also discuss how they rationalize known energetic requirements of some common biochemical motifs and provide new limits to others.  Finally, I will demonstrate how they can be used to derive Green-Kubo relations for the transport coefficients of homogenous active fluids in terms of steady-state current fluctuations.