On December 16th, Mr. Yoshimura gave us a talk about the decomposition of entropy production in stochastic and chemical systems. In the introductory part, he explained the two aspects of entropy production, nonstationarity and breaking of the detailed balance, as well as the strategy to decompose it. He first introduced important concepts such as detailed balance and cycle using an example of a simple Markov jump process. He then generalized the concepts to nonlinear kinetics including chemical reaction network systems. Lastly, he explained how we can decompose entropy production into excess and housekeeping parts, providing explicit simulation results. We are very grateful to him for the well-organized presentation!

Reported by Kyosuke Adachi