We show that the quantum disentanglement eraser implemented on a two-photon system from parametric down-conversion is a general method to create hybrid photonic entanglement, namely the entanglement between different degrees of freedom of the photon pair. To demonstrate this, we generate and characterize a source with tunable degree of hybrid entanglement between two qubits, one encoded in the transverse momentum and position of a photon, and the other in the polarization of its partner. In addition, we show that a simple extension of our setup enables the generation of two-photon qubit-qudit hybrid entangled states. Finally, we discuss the advantages that this type of entanglement can bring for an optical quantum network.
@article{arxiv.0906.4528,
title = {Hybrid photonic entanglement: Realization, characterization and applications},
author = {Leonardo Neves and Gustavo Lima and Aldo Delgado and Carlos Saavedra},
journal= {arXiv preprint arXiv:0906.4528},
year = {2015}
}