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Rate analysis for a hybrid quantum repeater

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons201161

Praxmeyer,  Ludmila
Optical Quantum Information Theory, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons201222

van Loock,  Peter
van Loock Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Bernardes, N. K., Praxmeyer, L., & van Loock, P. (2011). Rate analysis for a hybrid quantum repeater. PHYSICAL REVIEW A, 83(1): 012323. doi:10.1103/PhysRevA.83.012323.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6A31-3
Abstract
We present a detailed rate analysis for a hybrid quantum repeater assuming perfect memories and using optimal probabilistic entanglement generation and deterministic swapping routines. The hybrid quantum repeater protocol is based on atomic qubit-entanglement distribution through optical coherent-state communication. An exact, analytical formula for the rates of entanglement generation in quantum repeaters is derived, including a study on the impacts of entanglement purification and multiplexing strategies. More specifically, we consider scenarios with as little purification as possible and we show that for sufficiently low local losses, such purifications are still more powerful than multiplexing. In a possible experimental scenario, our hybrid system can create near-maximally entangled (F = 0.98) pairs over a distance of 1280 km at rates of the order of 100 Hz.