Hyperaccurate currents in stochastic thermodynamics.
- Busiello DM Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Physics Laboratory of Statistical Biophysics, 1015 Lausanne, Switzerland.
- Pigolotti S Biological Complexity Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan.
- 2020-01-23
Published in:
- Physical review. E. - 2019
English
Thermodynamic observables of mesoscopic systems can be expressed as integrated empirical currents. Their fluctuations are bound by thermodynamic uncertainty relations. We introduce the hyperaccurate current as the integrated empirical current with the least fluctuations in a given nonequilibrium system. For steady-state systems described by overdamped Langevin equations, we derive an equation for the hyperaccurate current by means of a variational principle. We show that the hyperaccurate current coincides with the entropy production if and only if the latter saturates the thermodynamic uncertainty relation, and it can be substantially more precise otherwise. The hyperaccurate current can be used to improve estimates of entropy production from experimental data.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevE.100.060102
- PMID 31962533
- Persistent URL
- https://sonar.ch/global/documents/204776
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