Controlled Quantum Teleportation in the Presence of an Adversary

TL;DR

This paper analyzes controlled quantum teleportation with an untrusted receiver, demonstrating that genuine tripartite nonlocality can certify control power even under adversarial noise, advancing secure quantum communication understanding.

Contribution

It introduces a device-independent framework for controlled quantum teleportation with untrusted parties, linking control power to genuine tripartite nonlocality under noise conditions.

Findings

Control power increases with genuine tripartite nonlocality

Control power remains robust under depolarizing noise

Nonlocality plays a key role in multipartite quantum information processing

Abstract

We present a device independent analysis of controlled quantum teleportation where the receiver is not trusted. We show that the notion of genuine tripartite nonlocality allows us to certify control power in such a scenario. By considering a specific adversarial attack strategy on a device characterized by depolarizing noise, we find that control power is a monotonically increasing function of genuine tripartite nonlocality. These results are relevant for building practical quantum communication networks and also shed light on the role of nonlocality in multipartite quantum information processing.