Real-time imaging of spin-to-orbital angular momentum quantum state teleportation

Abstract

Quantum teleportation is a process in which an unknown quantum state is transferred between two spatially separated subspaces of a bipartite quantum system which share an entangled state and communicate classically. In the case of photonic states, this process is probabilistic due to the impossibility of performing a two-particle complete Bell state analysis with linear optics. In order to achieve a deterministic teleportation scheme, harnessing other degrees of freedom of a single particle, rather than a third particle, has been proposed. Indeed, this leads to a novel type of deterministic teleportation scheme, the so-called hybrid teleportation. Here we report the first realization of photonic hybrid quantum teleportation from spin-to-orbital angular momentum degrees of freedom. In our scheme, the polarization state of photon A is transferred to orbital angular momentum of photon B. The teleported states are visualized in real-time by means of an intensified CCD camera. The quality of teleported states is verified by performing quantum state tomography, which confirms an average fidelity higher than 99.4%. We believe this experiment paves the route towards a novel way of quantum communication in which encryption and decryption are carried out in naturally different Hilbert spaces, and therefore may provide means of enhancing security.

5 pages, 3 figures and 1 table. Submitted!

References in corpus (4)

• Experimental quantum teleportation
• Beating the channel capacity limit for linear photonic superdense coding
• Remote Preparation of Single-Photon "Hybrid" Entangled and Vector-Polarization States
• Quantum teleportation in the spin-orbit variables of photon pairs

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• Hyper-entanglement of photons emitted by a quantum dot
• Orbital angular momentum mixing in type II second harmonic generation
• JRSP of three-particle state via three tripartite GHZ class in quantum noisy channels
• Remote state preparation of single photon orbital angular momentum lattices