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Entanglement and secret-key-agreement capacities of bipartite quantum interactions and read-only memory devices. (arXiv:1712.00827v2 [quant-ph] UPDATED)
来源于:arXiv
A bipartite quantum interaction corresponds to the most general quantum
interaction that can occur between two quantum systems. In this work, we
determine bounds on the capacities of bipartite interactions for entanglement
generation and secret key agreement. Our upper bound on the entanglement
generation capacity of a bipartite quantum interaction is given by a quantity
that we introduce here, called the bidirectional max-Rains information. Our
upper bound on the secret-key-agreement capacity of a bipartite quantum
interaction is given by a related quantity introduced here also, called the
bidirectional max-relative entropy of entanglement. We also derive tighter
upper bounds on the capacities of bipartite interactions obeying certain
symmetries. Observing that quantum reading is a particular kind of bipartite
quantum interaction, we leverage our bounds from the bidirectional setting to
deliver bounds on the capacity of a task that we introduce, called private
reading of a wiretap mem 查看全文>>