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Unified thermodynamic-kinetic uncertainty relation

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arxiv 2203.11501 v2 pith:LBOPHM52 submitted 2022-03-22 cond-mat.stat-mech quant-ph

classification cond-mat.stat-mechquant-ph
keywords uncertaintykineticprecisionthermodynamicconstraintcurrentcurrentsfluctuations
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Understanding current fluctuations is of fundamental importance and paves the way for the development of practical applications. According to the thermodynamic and kinetic uncertainty relations, the precision of currents can be constrained solely by total entropy production or dynamical activity. In this study, we derive a tighter bound on the precision of currents in terms of both thermodynamic and kinetic quantities, demonstrating that these quantities jointly constrain current fluctuations. The thermodynamic and kinetic uncertainty relations become particular cases of our result in asymptotic limits. Intriguingly, the unified thermodynamic-kinetic uncertainty relation leads to a tighter classical speed limit, refining the time constraint on the system's state transformation. The proposed framework can be extended to apply to state observables and systems with unidirectional transitions, thereby providing a constraint on the precision of the first-passage time.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Susceptibility-kinetic uncertainty relations for quantum systems

    quant-ph 2026-07 unverdicted novelty 7.0 of 10

    Derives a universal susceptibility-kinetic uncertainty relation for currents in open quantum systems by defining partial dynamical activity from quantum Fisher information on coupling strength.

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