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Experimental demonstration of continuous-variable quantum key distribution over 80 km of standard telecom fiber

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Experimental demonstration of continuous-variable quantum key distribution over 80 km of standard telecom fiber
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30
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CC Attribution - NonCommercial - NoDerivatives 2.5 Switzerland:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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We demonstrate for the first time that long-distance quantum key distribution can be achieved with continuous variables, using only standard telecommunication components. Furthermore, we obtain a positive secret key rate over long distances even when taking into account finite-size effects. These results correspond to a practical implementation guaranteeing the strongest level of security achievable with QKD and show that continuous-variable quantum key distribution is a technology of choice for near-future secure quantum communications.