Quantifying Coherence and Entanglement via Simple Measurements
Quantum Physics
2017-08-01 v1
Abstract
Coherence and entanglement are fundamental properties of quantum systems, promising to power the near future quantum computers, sensors and simulators. Yet, their experimental detection is challenging, usually requiring full reconstruction of the system state. We show that one can extract quantitative bounds to the relative entropy of coherence and the coherent information, coherence and entanglement quantifiers respectively, by a limited number of purity measurements. The scheme is readily implementable with current technology to verify quantum computations in large scale registers, without carrying out expensive state tomography.
Cite
@article{arxiv.1707.09928,
title = {Quantifying Coherence and Entanglement via Simple Measurements},
author = {Graeme Smith and John A. Smolin and Xiao Yuan and Qi Zhao and Davide Girolami and Xiongfeng Ma},
journal= {arXiv preprint arXiv:1707.09928},
year = {2017}
}
Comments
5 pages plus appendix