Department Colloquium | Thermodynamic Limits far from Equilibrium
Jordan Horowitz (U-M Biophysics, Complex Systems, Physics)
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. Without a robust nonequilibrium thermodynamics, we cannot address a whole host of pressing research questions regarding the energetic requirements to operate outside of equilibrium, like the energetic cost to form a pattern, replicate an organism, or sense an environment, to name a few. Research in nonequilibrium statistical thermodynamics is beginning to shed light on these questions. In this talk, I will present two such recent predictions. The first is a novel linear-response-like bound that quantifies how dissipation shapes fluctuations far from equilibrium. Besides its intrinsic allure as a universal relation, I will discuss how it can be used to probe the energetic efficiency of molecular motors, offer energetic constraints on chemical clocks, and bound the dissipation in complex materials, both biological and synthetic, allowing us to gain insight into the fundamental energetic requirements to operate out of thermodynamic equilibrium. The second is an extended second law of thermodynamics with information that quantifies the precise energetic costs to process information, make a measurement, and implement feedback.
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