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Berlin 2014 – wissenschaftliches Programm

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SYQE: Symposium Quantum Correlations Beyond Entanglement

SYQE 1: Quantum Correlations Beyond Entanglement I

SYQE 1.2: Hauptvortrag

Dienstag, 18. März 2014, 14:30–15:00, Audimax

Experimental entanglement distribution by separable states — •Roman Schnabel1, C.E. Vollmer1, D. Schulze1, T. Eberle1, V. Händchen1, and J. Fiurasek21Institut für Gravitationsphysik (Albert-Einstein-Institut), Leibniz Universität Hannover — 2Department of Optics, Palacky University, Olomouc, Czech Republic

Distribution of entanglement between macroscopically separated parties is crucial for future quantum information networks. Surprisingly, it has been theoretically shown [1,2] that two distant systems can be entangled by sending a third system that is not entangled with either of them. Here, we experimentally distribute entanglement and successfully prove that our transmitted light beam is indeed not entangled with the parties’ local systems. Our work [3], as well as related work by other groups [4,5], demonstrates an unexpected variant of entanglement distribution [6] and improves the understanding necessary to engineer multipartite quantum networks in noisy environments.

[1] T. S. Cubitt, F. Verstraete, W. Dür, J. I. Cirac, Phys. Rev. Lett. 91, 037902 (2003).

[2] L. Mista, N. Korolkova, Phys. Rev. A 77, 050302 (2008).

[3] C. E. Vollmer, D. Schulze, T. Eberle, V. Händchen, J. Fiurasek, R. Schnabel, Phys. Rev. Lett. 111, 230505 (2013).

[4] A. Fedrizzi, M. Zuppardo, G. G. Gillett, M. A. Broome, M. de Almeida, M. Paternostro, A. G. White, T. Paterek, Phys. Rev. Lett. 111, 230504 (2013).

[5] C. Peuntinger, V. Chille, L. Mista, N. Korolkova, M. Förtsch, J. Korger, C. Marquardt, G. Leuchs, Phys. Rev. Lett. 111, 230506 (2013).

[6] C. Silberhorn, Viewpoint: Sharing Entanglement without Sending It, Physics 6, 132 (2013).

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