Authenticated teleportation and verification in a noisy network

TL;DR

This paper presents a practical protocol for authenticated quantum teleportation that verifies the integrity of transmitted states in noisy and adversarial conditions, with applications to graph state verification.

Contribution

It introduces a new protocol for authenticated teleportation resilient to noise and adversaries, and analyzes its security and performance in realistic noisy quantum networks.

Findings

Protocol achieves secure teleportation in noisy environments

Performance analysis under realistic noise models

Application to verification of noisy graph states

Abstract

Authenticated teleportation aims to certify the transmission of a quantum state through teleportation, even in the presence of an adversary. This scenario can be pictured in terms of an untrusted source distributing a Bell state between two parties who wish to verify it using some simple tests. We propose a protocol that achieves this goal in a practical way, and analyse its performance and security when the parties have noisy measurement devices. Further, we model a realistic experimental scenario where the state is subject to noise and dephasing. We finally apply our analysis to the verification of graph states with noisy measurement devices.