Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength

Details Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength

2003-01-31

arxiv.org/abs/quant-ph/0301178v1

Nature 421, 509-513 (2003)

Physics

Quantum Physics

7 pages, 5 figures, Extended version of Nature letter

Scientific paper

10.1038/nature01376

Elementary 2-dimensional quantum states (qubits) encoded in 1300 nm wavelength photons are teleported onto 1550 nm photons. The use of telecommunication wavelengths enables to take advantage of standard optical fibre and permits to teleport from one lab to a distant one, 55 m away, connected by 2 km of fibre. A teleportation fidelity of 81.2 % is reported. This is large enough to demonstrate the principles of quantum teleportation, in particular that entanglement is exploited. This experiment constitutes a first step towards a quantum repeater.

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