Work as an external quantum observable and an operational quantum work
fluctuation theorem
- URL: http://arxiv.org/abs/2003.06437v2
- Date: Tue, 6 Oct 2020 15:25:17 GMT
- Title: Work as an external quantum observable and an operational quantum work
fluctuation theorem
- Authors: Konstantin Beyer, Kimmo Luoma, and Walter T. Strunz
- Abstract summary: We argue that quantum work fluctuation theorems which rely on the knowledge of $H_mathcalS$ are of little practical relevance, contrary to their classical counterparts.
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.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We 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 $H_\mathcal{S}$. We argue that quantum work fluctuation theorems
which rely on the knowledge of $H_\mathcal{S}$ 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.
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