Distribution of Time-Bin Entangled Qubits over 50 km of Optical Fiber

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin
Phys. Rev. Lett. 93, 180502 – Published 28 October 2004

Abstract

We report experimental distribution of time-bin entangled qubits over 50 km of optical fibers. Using actively stabilized preparation and measurement devices we demonstrate violation of the Clauser-Horne-Shimony-Holt Bell inequality by more than 15 standard deviations without removing the detector noise. In addition we report a proof-of principle experiment of quantum key distribution over 50 km of optical fibers using entangled photon.

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  • Received 21 April 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.180502

©2004 American Physical Society

Authors & Affiliations

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin

  • Group of Applied Physics-Optique, University of Geneva, CH-1211, Geneva 4, Switzerland

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Issue

Vol. 93, Iss. 18 — 29 October 2004

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