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quant-ph2005
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…
quant-ph2005
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…