Secrecy capacities of compound quantum wiretap channels and applications

Abstract

We determine the secrecy capacity of the compound channel with quantum wiretapper and channel state information at the transmitter. Moreover, we derive a lower bound on the secrecy capacity of this channel without channel state information and determine the secrecy capacity of the compound classical-quantum wiretap channel with channel state information at the transmitter. We use this result to derive a new proof for a lower bound on the entanglement generating capacity of compound quantum channel. We also derive a new proof for the entanglement generating capacity of compound quantum channel with channel state information at the encoder.

We revised and improved our paper arXiv:1208.1151. We added a new result for capacity and a new section for applications. arXiv admin note: text overlap with arXiv:1202.0773. Published in the 1 May 2014 issue of Physical Review A, Vol.89, No.5