Quantum teleportation of light beams

Details Quantum teleportation of light beams Quantum teleportation of light beams

2002-07-12

arxiv.org/abs/quant-ph/0207076v1

Physics

Quantum Physics

17 pages, 19 figures, submitted to PRA

Scientific paper

10.1103/PhysRevA.67.033802

We experimentally demonstrate quantum teleportation for continuous variables using squeezed-state entanglement. The teleportation fidelity for a real experimental system is calculated explicitly, including relevant imperfection factors such as propagation losses, detection inefficiencies and phase fluctuations. The inferred fidelity for input coherent states is F = 0.61 +- 0.02, which when corrected for the efficiency of detection by the output observer, gives a fidelity of 0.62. By contrast, the projected result based on the independently measured entanglement and efficiencies is 0.69. The teleportation protocol is explained in detail, including a discussion of discrepancy between experiment and theory, as well as of the limitations of the current apparatus.

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