608 citations · 2.5k across the 47 of their papers we have counts for
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Properties of Conjugate Channels with Applications to Additivity and Multiplicativity
Christopher King, Keiji Matsumoto, Michael Nathanson +1
Quantum channels can be described via a unitary coupling of system and environment, followed by a trace over the environment state space. Taking the trace instead over the system s…
Multiplicativity of completely bounded p-norms implies a new additivity result
Igor Devetak, Marius Junge, Christopher King +1
We prove additivity of the minimal conditional entropy associated with a quantum channel Phi, represented by a completely positive (CP), trace-preserving map, when the infimum of S…
Maximal output purity and capacity for asymmetric unital qudit channels
Nilanjana Datta, Mary Beth Ruskai
We consider generalizations of depolarizing channels to maps in which the identity channel is replaced by a convex combinations of unitary conjugations. We show that one can constr…