Thermodynamic work cost of quantum estimation protocols
Abstract
We discuss thermodynamic work cost of various stages of a quantum estimation protocol: probe and memory register preparation, measurement and extraction of work from post-measurement states. We consider both (i) a multi-shot scenario, where average work is calculated in terms of the standard Shannon entropy and (ii) a single-shot scenario, where deterministic work is expressed in terms of min- and max-entropies. We discuss an exemplary phase estimation protocol where estimation precision is optimized under a fixed work credit (multi-shot) or a total work cost (single-shot). In the multi-shot regime precision is determined using the concept of Fisher information, while in the single-shot case we advocate the use of confidence intervals as only they can provide a meaningful and reliable information in a single-shot experiment, combining naturally with the the concept of deterministic work.
Cite
@article{arxiv.1805.01477,
title = {Thermodynamic work cost of quantum estimation protocols},
author = {Patryk Lipka-Bartosik and Rafal Demkowicz-Dobrzanski},
journal= {arXiv preprint arXiv:1805.01477},
year = {2018}
}
Comments
25 pages, 3 figures, published version