Abstract
We generalize the Clausius (in)equality to overdamped mesoscopic and macroscopic diffusions in the presence of nonconservative forces. In contrast to previous frameworks, we use a decomposition scheme for heat which is based on an exact variant of the Minimum Entropy Production Principle as obtained from dynamical fluctuation theory. This new extended heat theorem holds true for arbitrary driving and does not require assumptions of local or close to equilibrium. The argument remains exactly intact for diffusing fields where the fields correspond to macroscopic profiles of interacting particles under hydrodynamic fluctuations. We also show that the change of Shannon entropy is related to the antisymmetric part under a modified time-reversal of the time-integrated entropy flux.
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Notes
Studies on the heat theorem were started by Clausius since about 1855, with the final emergence of the entropy concept in [1].
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Acknowledgements
This work started from discussions with Keiji Saito, Hal Tasaki, Shin-Ichi Sasa and Naoko Nakagawa in January–February 2012. CM wishes to thank the hospitality of the Yukawa institute in Kyoto and of Hisao Hayakawa in particular. KN thanks Shin-Ichi Sasa for fruitful discussions and acknowledges the support from the Grant Agency of the Czech Republic, Grant no. P204/12/0897.
The results of the present paper were first reported on 6 June 2012 at the Isola del Giglio during the workshop on Non-equilibrium fluctuation-response relations, June 5–8, 2012, in parallel with the talk by G. Jona-Lasinio on the work in [11, 12]. In that same context we are also grateful for private communication with K. Gawedzki.
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In honor of Herbert Spohn on the occasion of his 65th birthday.
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Maes, C., Netočný, K. A Nonequilibrium Extension of the Clausius Heat Theorem. J Stat Phys 154, 188–203 (2014). https://doi.org/10.1007/s10955-013-0822-9
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DOI: https://doi.org/10.1007/s10955-013-0822-9