Message Transmission over Classical Quantum Channels with a Jammer with Side Information: Message Transmission Capacity and Resources

TL;DR

This paper introduces a new model for arbitrarily varying classical-quantum channels with a jammer having side information, analyzing capacity under different scenarios and establishing the strong converse, showing that revealing the message to the jammer does not affect capacity.

Contribution

The paper determines the capacity of a new model of classical-quantum channels with a jammer possessing side information, for both scenarios and error criteria, and proves the strong converse.

Findings

Capacities are equal for both scenarios and error criteria.

Revealing the message to the jammer does not change the capacity.

Established the strong converse for the model.

Abstract

In this paper we propose a new model for arbitrarily varying classical-quantum channels. In this model a jammer has side information. We consider two scenarios. In the first scenario the jammer knows the channel input, while in the second scenario the jammer knows both the channel input and the message. The transmitter and receiver share a secret random key with a vanishing key rate. We determine the capacity for both average and maximum error criteria for both scenarios. We also establish the strong converse. We show that all these corresponding capacities are equal, which means that additionally revealing the message to the jammer does not change the capacity.