Quantum state transfer between two photons with polarization and orbital angular momentum via quantum teleportation technology

TL;DR

This paper demonstrates a quantum teleportation-based method to transfer a single photon's quantum state from polarization to orbital angular momentum, achieving high fidelity in a linear optical system.

Contribution

It introduces a novel quantum state transfer technique between different degrees of freedom of photons using teleportation with high Bell-state discrimination.

Findings

Achieved 91.8% fidelity in quantum state transfer.

Implemented high Bell-efficiency with full Bell-state discrimination.

Validated transfer across six different Bloch sphere states.

Abstract

Quantum teleportation is a useful quantum information technology to transmit quantum states between different degrees of freedom. We here report a quantum state transfer experiment in the linear optical system, transferring a single photon state in the polarization degree of freedom (DoF) to another photon in the orbital angular momentum (OAM) quantum state via a biphoton OAM entangled channel. Our experimental method is based on quantum teleportation technology. The differences between ours and the original teleportation scheme is that the transfer state is known in ours, and our method is for different particles with different DoFs while the original one is for different particles with same DoF. Besides, our present experiment is implemented with a high Bell-efficiency since each of the four hybrid-entangled Bell states can be discriminated. We use six states of poles of the Bloch sphere to test our experiment, and the fidelity of the quantum state transfer is $91.8\pm1.3\%$.