Studies of femtosecond time‐bin entangled qubits for quantum communications

I. Marcikic; Hugues de Riedmatten; Wolfgang Tittel; Valerio Scarani; Antonio Acín; Sébastien Tanzilli; Hugo Zbinden; Nicolas Gisin

doi:10.1002/prop.200310058

Abstract

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We create pairs of non‐degenerate time‐bin entangled photons at telecom wavelengths with ultra‐short pump pulses. Entanglement is shown by performing Bell kind tests of the Franson type with visibilities of up to 91 time‐bin entanglement can easily be protected from decoherence as encountered in optical fibers, this experiment opens the road for complex quantum communication protocols over long distances.

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