Correlations have been identified as a necessary ingredient for the speedup of certain
mixed-state quantum computation. In this work, we analyze the model of deterministic …

The variance of quantum channels involving a mixed state gives a hybrid of classical and
quantum uncertainties. We seek certain decomposition of variance into classical and …

In this work, we employ the squared Hilbert-Schmidt norm of the Gram matrix for a quantum
channel as a reversibility quantifier of this channel, which is shown to be complementary to …

It is important to distinguish between classical information and quantum information in
quantum information theory. In this paper, we first extend the concept of metric-adjusted …