Dynamical activity universally bounds precision of response in Markovian nonequilibrium systems

• DOI: 10.1038/s42005-025-01982-w
• Publication Date: 2025-02-11T11:57:26Z
• Authors: Kangqiao Liu; Jie Gu
• Keywords: QB460-466; Condensed Matter - Mesoscale and Nanoscale Physics; Statistical Mechanics (cond-mat.stat-mech); Physics; QC1-999; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); FOS: Physical sciences; Astrophysics; Condensed Matter - Statistical Mechanics

17 + 0 pages, 3 + 0 figures, 1 + 0 tables. *title changed; new figure and new sections added<br/>The exploration of far-from-equilibrium systems has been at the forefront of nonequilibrium thermodynamics, with a particular focus on understanding the fluctuations and response of thermodynamic systems to external perturbations. In this study, we introduce a universal response kinetic uncertainty relation, which provides a fundamental trade-off between the precision of response for generic observables and dynamical activity in Markovian nonequilibrium systems. We demonstrate the practical applicability and tightness of the derived bound through illustrative examples. Our results are applicable to a broad spectrum of Markov jump processes, ranging from currents to non-current variables, from steady states to time-dependent driving, from continuous time to discrete time, and including Maxwell's demon or absolute irreversibility. Our findings not only enhance the theoretical foundation of stochastic thermodynamics but also may hold potential implications for far-from-equilibrium biochemical processes.<br/>