Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum information: Quantum computers and communication I
Q 59.7: Vortrag
Freitag, 21. März 2014, 12:00–12:15, DO26 207
Hybrid Error Correction — •Jörg Duhme1, Christoph Pacher2, Fabian Furrer3, and Reinhard Werner1 — 1Leibniz Universität Hannover, Institut für Theoretische Physik, AG Quanteninformation — 2Austrian Institute of Technology, Wien — 3The University of Tokyo, Graduate School of Science
We present an error correction (EC) scheme directly designed for the entanglement based CV-QKD protocol using entangled squeezed gaussian states (PRL 109, 100502 (2012) ). The starting point of our hybrid EC is the description of errors in the raw keys given by Bob's gaussian state conditioned on Alice former measurement outcome. We write the noisy alphabet elements of the raw keys as linear combination of two new alphabets. The idea is, to reduce the noise in the first step of the hybrid EC to only one of the two new alphabets. The errors left by the first step can in the second step be corrected by for example non-binary LDPC.