Noisy quantum teleportation: An experimental study on the influence of local environments

TL;DR

This study experimentally investigates how local noisy environments affect quantum teleportation fidelity, demonstrating conditions where the protocol becomes robust against noise, using photonic qubits and environment simulations.

Contribution

It provides experimental validation of noise-insensitive conditions in quantum teleportation, highlighting potential robustness strategies against environmental noise.

Findings

Noise-induced fidelity enhancement observed

Conditions for insensitivity to specific noise types identified

Good agreement between experiment and theory achieved

Abstract

We report experimental results on the action of selected local environments on the fidelity of the quantum teleportation protocol, taking into account non-ideal, realistic entangled resources. Different working conditions are theoretically identified, where a noisy protocol can be made almost insensitive to further addition of noise. We put to test these conditions on a photonic implementation of the quantum teleportation algorithm, where two polarization entangled qubits act as the entangled resource and a path qubit on Alice encodes the state to be teleported. Bob's path qubit is used to implement a local environment, while the environment on Alice's qubit is simulated as a weighed average of different pure states. We obtain a good agreement with the theoretical predictions, we experimentally recreate the conditions to obtain a noise-induced enhancement of the protocol fidelity, and we identify parameter regions of increased insensibility to interactions with specific noisy environments.