Practical Quantum Teleportation of an Unknown Quantum State

TL;DR

This paper presents a comprehensive theory for practical quantum teleportation of unknown states, accounting for real-world experimental limitations and enabling optimization of fidelity in linear optics setups.

Contribution

It introduces a detailed model that incorporates experimental imperfections, guiding experimentalists to improve quantum teleportation fidelity.

Findings

Model aligns well with recent experimental results

Provides a method to optimize teleportation fidelity

Accounts for multi-photon, detector inefficiencies, and channel losses

Abstract

We develop a theory to teleport an unknown quantum state using entanglement between two distant parties. Our theory takes into account experimental limitations due to contribution of multi-photon pair production of parametric down conversion source, inefficiency and dark counts of detectors and channel losses. We use a linear optics setup for quantum teleportation of an unknown quantum state by performing Bell state measurement by the sender. Our theory successfully provides a model for experimentalists to optimize the fidelity by adjusting the experimental parameters. We apply our model to a recent experiment on quantum teleportation and the results obtained by our model are in good agreement with the experiment results.