Weighted Uncertainty Relations
Quantum Physics
2016-03-29 v2
Abstract
Recently, Maccone and Pati have given two stronger uncertainty relations based on the sum of variances and one of them is nontrivial when the quantum state is not an eigenstate of the sum of the observables. We derive a family of weighted uncertainty relations to provide an optimal lower bound for all situations and remove the restriction on the quantum state. Generalization to multi-observable cases is also given and an optimal lower bound for the weighted sum of the variances is obtained in general quantum situation.
Cite
@article{arxiv.1603.01004,
title = {Weighted Uncertainty Relations},
author = {Yunlong Xiao and Naihuan Jing and Xianqing Li-Jost and Shao-Ming Fei},
journal= {arXiv preprint arXiv:1603.01004},
year = {2016}
}
Comments
10 pages; 1 new reference is added