All entangled states can demonstrate non-classical teleportation

TL;DR

This paper introduces a new benchmark for quantum teleportation demonstrating that all entangled states can exhibit non-classical teleportation, surpassing classical limits by utilizing full experimental information.

Contribution

The authors propose a novel benchmark and the concept of non-classical teleportation witnesses, showing that all entangled states can implement genuinely quantum teleportation channels.

Findings

All entangled states can demonstrate non-classical teleportation.

A new benchmark surpassing classical fidelity limits is introduced.

Techniques for certifying quantum teleportation quality are developed.

Abstract

Quantum teleportation, the process by which Alice can transfer an unknown quantum state to Bob by using pre-shared entanglement and classical communication, is one of the cornerstones of quantum information. The standard benchmark for certifying quantum teleportation consists in surpassing the maximum average fidelity between the teleported and the target states that can be achieved classically. According to this figure of merit, not all entangled states are useful for teleportation. Here we propose a new benchmark that uses the full information available in a teleportation experiment and prove that all entangled states can implement a quantum channel which can not be reproduced classically. We introduce the idea of non-classical teleportation witness to certify if a teleportation experiment is genuinely quantum and discuss how to quantify this phenomenon. Our work provides new techniques for studying teleportation that can be immediately applied to certify the quality of quantum technologies.