A1 Refereed original research article in a scientific journal

Work as an external quantum observable and an operational quantum work fluctuation theorem




AuthorsBeyer K, Luoma K, Strunz WT

PublisherAMER PHYSICAL SOC

Publication year2020

JournalPhysical Review Research

Journal name in sourcePHYSICAL REVIEW RESEARCH

Journal acronymPHYS REV RES

Article numberARTN 033508

Volume2

Issue3

Number of pages9

DOIhttps://doi.org/10.1103/PhysRevResearch.2.033508


Abstract
e propose a definition of externally measurable quantum work in driven systems. Work is given as a quantum observable on a control device which is forcing the system and can be determined without knowledge of the system Hamiltonian (H) over cap (S). We argue that quantum work fluctuation theorems which rely on the knowledge of (H) over cap (S) are of little practical relevance, contrary to their classical counterparts. Using our framework, we derive a fluctuation theorem which is operationally accessible and could in principle be implemented in experiments to determine bounds on free energy differences of unknown systems.



Last updated on 2024-26-11 at 12:49