Continuous Variable QKD Protocols in Realistic Environments and Entanglement Verification in Qubit-Mode Systems
Continuous variables techniques in quantum key distribution are characterized by the replacement of photon counting by homodyne or heterodyne detection. We investigate expected key rates using coherent states with a Gaussian distribution of amplitudes as signal states and pay special attention to excess noise in the channel and to the fact that any practical error correction will deviate from the ideal Shannon limit. We propose a combination of reverse reconciliation and post-selection to provide stable key rates. We also analyse the situation of just two input states in a noiseless environment and limits of the tolerable excess noise.
AQIS template
Matthias Heid Hauke H(a)seler Johannes Rigas Tobias Moroder Norbert Lütkenhaus
Institute for Quantum Computing University of Waterloo 200 University Avenue West, Waterloo, ON, N2L Institut für Theoretische Physik Universit(a)t Erlangen-Nürnberg Staudtstr 7, 91058 Erlangen, German
国际会议
Asian Conference on Quantum Onformation Science 2006(2006亚洲量子信息大会)
北京
英文
3-4
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）