Abstract
We analyze the efficiency and scalability of the DLCZ protocol for quantum repeaters through experimentally accessible measures of entanglement like concurrence and CHSH inequality, taking into account the state degradation due to various imperfections of the stored entangled states. We also provide a more accurate estimate for the average time required to succeed in each step of the protocol. The minimum purity analysis and the new time estimates are then combined to trace the perspectives for implementation of the DLCZ protocol in present-day laboratory setups.
© 2011 Optical Society of America
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