Quantum teleportation on a photonic chip

TL;DR

This paper demonstrates the first integrated photonic chip capable of performing all key steps of quantum teleportation, advancing scalable quantum communication and computing technologies.

Contribution

It introduces a reconfigurable integrated photonic chip that performs entanglement, Bell-state analysis, and state tomography for quantum teleportation, with a novel error mitigation method.

Findings

Successful on-chip quantum teleportation demonstration

Reconfigurable photonic chip integrates all key teleportation components

Element-wise characterization improves circuit fidelity

Abstract

Quantum teleportation is a fundamental concept in quantum physics which now finds important applications at the heart of quantum technology including quantum relays, quantum repeaters and linear optics quantum computing (LOQC). Photonic implementations have largely focussed on achieving long distance teleportation due to its suitability for decoherence-free communication. Teleportation also plays a vital role in the scalability of photonic quantum computing, for which large linear optical networks will likely require an integrated architecture. Here we report the first demonstration of quantum teleportation in which all key parts - entanglement preparation, Bell-state analysis and quantum state tomography - are performed on a reconfigurable integrated photonic chip. We also show that a novel element-wise characterisation method is critical to mitigate component errors, a key technique which will become increasingly important as integrated circuits reach higher complexities necessary for quantum enhanced operation.