| Full text | |
| Author(s): |
Busiello, D. M.
;
Fiore, C. E.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Journal of Physics A-Mathematical and Theoretical; v. 55, n. 48, p. 17-pg., 2022-12-02. |
| Abstract | |
Generalized empirical currents represent a vast class of thermodynamic observables of mesoscopic systems. Their fluctuations satisfy the thermodynamic uncertainty relations (TURs), as they can be bounded by the average entropy production. Here, we derive a general closed expression for the hyperaccurate current in discrete-state Markovian systems, i.e. the one with the least fluctuations, for both discrete- and continuous-time evolution. We show that its associated hyperaccurate bound is generally much tighter than the one given by the TURs, and might be crucial to providing a reliable estimation of the average entropy production. We also show that one-loop systems (rings) exhibit a hyperaccurate current only for finite times, highlighting the importance of short-time observations. Additionally, we derive two novel bounds for the efficiency of work-to-work converters, solely as a function of either the input or the output power. Finally, our theoretical results are employed to analyze a six-state model network for kinesin, and a chemical system in a thermal gradient exhibiting a dissipation-driven selection of states. (AU) | |
| FAPESP's process: | 21/03372-2 - Stochastic thermodynamics of phase transitions and periodically driven systems |
| Grantee: | Carlos Eduardo Fiore dos Santos |
| Support Opportunities: | Regular Research Grants |