Femtosecond Time-Bin Entangled Qubits for Quantum Communication

Details Femtosecond Time-Bin Entangled Qubits for Quantum Communication Femtosecond Time-Bin Entangled Qubits for Quantum Communication

2002-05-23

arxiv.org/abs/quant-ph/0205144v2

Phys. Rev. A 66,062308 (2002)

Physics

Quantum Physics

6 pages, 7 figures

Scientific paper

10.1103/PhysRevA.66.062308

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%. As 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. We also investigate the creation of more than one photon pair in a laser pulse and present a simple tool to quantify the probability of such events to happen.

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