Hans Maassen
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View article: Matrix forms of immanant inequalities
Matrix forms of immanant inequalities Open
We translate inequalities and conjectures for immanants and generalized matrix functions into inequalities in the Löwner order. These have the form of trace polynomials and generalize the inequalities from [FH, J. Math. Phys. 62 (2021), 2,…
View article: Quasirandom quantum channels
Quasirandom quantum channels Open
Mixing (or quasirandom) properties of the natural transition matrix associated to a graph can be quantified by its distance to the complete graph. Different mixing properties correspond to different norms to measure this distance. For dens…
View article: Optimality of entropic uncertainty relations
Optimality of entropic uncertainty relations Open
The entropic uncertainty relation proven by Maassen and Uffink for arbitrary pairs of two observables is known to be nonoptimal. Here, we call an uncertainty relation optimal, if the lower bound can be attained for any value of either of t…