A new coherence measure based on fidelity
Quantum Physics
2017-07-06 v2
Abstract
Quantifying coherence is an essential endeavor for both quantum foundations and quantum technologies. In this paper, we put forward a quantitative measure of coherence by following the axiomatic definition of coherence measures introduced in [T. Baumgratz, M. Cramer, and M. B. Plenio, Phys. Rev. Lett. 113, 140401 (2014)]. Our measure is based on fidelity and analytically computable for arbitrary states of a qubit. As one of its applications, we show that our measure can be used to examine whether a pure qubit state can be transformed into another pure or mixed qubit state only by incoherent operations.
Cite
@article{arxiv.1706.07941,
title = {A new coherence measure based on fidelity},
author = {C. L. Liu and Da-Jian Zhang and Xiao-Dong Yu and Qi-Ming Ding and Longjiang Liu},
journal= {arXiv preprint arXiv:1706.07941},
year = {2017}
}
Comments
10 pages