Uncertainty relations in the product form

@article{Huang2018UncertaintyRI,
  title={Uncertainty relations in the product form},
  author={Xiaofen Huang and Ting-Gui Zhang and N. Jing},
  journal={Chinese Physics B},
  year={2018},
  volume={27},
  pages={070302}
}
We study the uncertainty relation in the product form of variances and obtain some new uncertainty relations with weight, which are shown to be tighter than those derived from the Cauchy Schwarz inequality. 
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