Qscale Quantum technologies for extending the range of quantum communications

First Generation of Hybrid Entanglement of Light : 2 papers published back-to-back in Nature Photonics


Artistic depiction of entanglement between particle-like and wave-like quantum states, which two groups of the QScale consortium (LKB team and INO-CNR team) have reported concurrently in the July issue of Nature Photonics (© Nature Photonics).

Two teams of the QSCALE consortium reported the first experimental demonstrations of hybrid entanglement between particle-like and wave-like optical states. The two papers, one by the group of Julien Laurat in Paris and one by the group of Marco Bellini in Firenze, are published back-to-back in the July issue of Nature Photonics. Nature Photonics made the cover out of this new state of light !

Beyond its fundamental significance as an optical version of the famous Schrodinger cat state paradox and its interest for studying the various instantiations of entanglement, such hybrid state is also very useful for quantum information processing. It enables for instance the connection of quantum processors based on different encodings, i.e. discrete- and continuous-variable ones. These two leaps in quantum state engineering provide a new resource for optical hybrid architectures and quantum networks operations based on heterogenous systems.

O. Morin, K. Huang, J. Liu, H. Le Jeannic, C. Fabre and J. Laurat, Remote creation of hybrid entanglement between particle-like and wave-like optical qubits, Nature Photonics 8, 570-574 (2014).

ArXiv pre-print : http://arxiv.org/abs/1309.6191

H. Jeong, A. Zavatta, M. Kang, S.-W. Lee, L.S. Costanzo, S. Grandi, T.C. Ralph and M. Bellini, Generation of hybrid entanglement of light, Nature Photonics 8, 564-569 (2014).

ArXiv pre-print : http://arxiv.org/abs/1309.6192

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