Partially Coherent Direct Sum Channels

2 Aug 2020 Stefano Chessa Vittorio Giovannetti

We introduce Partially Coherent Direct Sum (PCDS) quantum channels, as a generalization of the already known Direct Sum quantum channels. We derive necessary and sufficient conditions to identify the subset of those maps which are degradable, and provide a simplified expression for their quantum capacities... (read more)

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  • QUANTUM PHYSICS