The authors provide a family of lower bounds on the product of variances of unitary operators, each at least as strong as the Gram-determinant bound of Bong et al., and tighter in many cases.
Weyl, Gruppentheorie und Quantenmechanik (Hirzel, Leipzig, 1928) [English translation, H
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Strong unitary uncertainty relations
The authors provide a family of lower bounds on the product of variances of unitary operators, each at least as strong as the Gram-determinant bound of Bong et al., and tighter in many cases.