# Model-Free Measurement of Local Entropy Production and Extractable Work in Active Matter.

@article{Ro2021ModelFreeMO, title={Model-Free Measurement of Local Entropy Production and Extractable Work in Active Matter.}, author={Sunghan Ro and Buming Guo and A.S. Shih and Trung V. Phan and Robert H. Austin and Dov Levine and Paul M. Chaikin and Stefano Martiniani}, journal={Physical review letters}, year={2021}, volume={129 22}, pages={ 220601 } }

Time-reversal symmetry breaking and entropy production are universal features of nonequilibrium phenomena. Despite its importance in the physics of active and living systems, the entropy production of systems with many degrees of freedom has remained of little practical significance because the high dimensionality of their state space makes it difficult to measure. Here we introduce a local measure of entropy production and a numerical protocol to estimate it. We establish a connection between…

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