From quantum fusiliers to high-performance networks

Details From quantum fusiliers to high-performance networks From quantum fusiliers to high-performance networks

2009-10-21

arxiv.org/abs/0910.4038v1

Nature Photonics, vol 4, pp 792-796 (2010)

Physics

Quantum Physics

2 figures, Comments welcome

Scientific paper

Our objective was to design a quantum repeater capable of achieving one million entangled pairs per second over a distance of 1000km. We failed, but not by much. In this letter we will describe the series of developments that permitted us to approach our goal. We will describe a mechanism that permits the creation of entanglement between two qubits, connected by fibre, with probability arbitrarily close to one and in constant time. This mechanism may be extended to ensure that the entanglement has high fidelity without compromising these properties. Finally, we describe how this may be used to construct a quantum repeater that is capable of creating a linear quantum network connecting two distant qubits with high fidelity. The creation rate is shown to be a function of the maximum distance between two adjacent quantum repeaters.

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