Quantum scissors: Teleportation of single-mode optical states by means of a nonlocal single photon

TLDR

This work experimentally realizes the quantum scissors device originally proposed by Pegg, Phillips and Barnett. The authors aim to teleport single‑mode optical states using a single‑photon entangled with vacuum via the Bennett protocol. They generate the entangled state with a symmetric beam splitter and analyze the teleported ensembles with homodyne tomography, achieving up to 99 % fidelity for low‑amplitude source states. Teleportation truncates coherent states to the first two Fock terms, with fidelities reaching 99 % for low amplitudes. The quantum scissors device was originally proposed by Pegg, Phillips and Barnett in *Phys.

Abstract

We employ the quantum state of a single photon entangled with the vacuum (|GROUP⟩A|GROUP⟩B − |GROUP⟩A|GROUP⟩B), generated by a photon incident upon a symmetric beam splitter, to teleport single-mode quantum states of light by means of the Bennett protocol. The teleportation of coherent states results in the truncation of their Fock expansion to the first two terms. We analyze the teleported ensembles by means of homodyne tomography and obtain fidelities of up to 99 per cent for low-source state amplitudes. This work is an experimental realization of the quantum scissors device proposed by Pegg, Phillips and Barnett (Phys. Rev. Lett., 81 (1998) 1604).