Dissipation bounds precision of current response to kinetic perturbations

Speaker: dr Krzysztof Ptaszyński

Affiliation: Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland

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Abstract: The precision of currents in Markov networks is bounded by dissipation via the so-called thermodynamic uncertainty relation (TUR) [1]. In my presentation, I will discuss a recently conjectured [2] and later proven [3] similar inequality that bounds the precision of the current response to perturbations of kinetic barriers. Perturbations of such type, which affect only the system kinetics but not the thermodynamic forces, are highly important in biochemistry and nanoelectronics. The new inequality cannot be derived from the standard TUR, but rather implies it and provides an even tighter bound for dissipation. I will also discuss a procedure for obtaining the optimal response precision for a given model.

[1] A. C. Barato, U. Seifert, Phys. Rev. Lett. 114, 158101 (2015)
[2] K. Ptaszyński, T. Aslyamov, M. Esposito, Phys. Rev. Lett. 133, 227101 (2024)
[3] T. Aslyamov, K. Ptaszyński, M. Esposito, arXiv:2410.17140