Deterministic quantum teleportation of a path-encoded state using entangled photons

TL;DR

This paper demonstrates a deterministic quantum teleportation scheme using entangled photons and path encoding, achieving high fidelity and 100% Bell State Measurement success in an optical setup.

Contribution

It introduces a novel deterministic teleportation method utilizing path encoding and polarization entanglement, improving upon probabilistic schemes.

Findings

Achieved 88% average teleportation fidelity.

Demonstrated 100% Bell State Measurement outcome.

Showed potential for fidelity improvement through interferometer visibility.

Abstract

Quantum teleportation enables a way to transmit an arbitrary qubit state from one place to an other. A standard scheme for teleportation in optical setup involve three photons, an entangled photon pair and a photon carrying quantum state to be teleported. The interaction between the photons in the scheme makes quantum teleportation probabilistic. Here we demonstrate a deterministic teleportation of an arbitrary qubit state using only a polarization entangled photon pair in a linear optical setup. By introducing the path degree of freedom to one of the entangled photon and encoding the arbitrary qubit state into it, we demonstrate 100\% Bell State Measurement (BSM) outcome. This enables a deterministic teleportation of a qubit state in an optical scheme with high fidelity. We report an average teleportation fidelity of 88.00%. The dependency of fidelity on the visibility of single-photon interferometer used for path qubit state shows the possibility of further improving the fidelity of quantum teleportation.