6533b86efe1ef96bd12cb61c
RESEARCH PRODUCT
Quantum repeaters and quantum key distribution: analysis of secret key rates
Nadja K. BernardesNadja K. BernardesSilvestre AbruzzoDagmar BrußPeter Van LoockPeter Van LoockPeter Van LoockHermann KampermannSylvia Bratziksubject
PhysicsQuantum networkQuantum PhysicsFOS: Physical sciencesQuantum entanglementQuantum PhysicsQuantum key distributionTopologyAtomic and Molecular Physics and OpticsQuantum technologyOpen quantum systemQuantum cryptographyQuantum mechanicsQubitQuantum Physics (quant-ph)Quantum information sciencedescription
We analyze various prominent quantum repeater protocols in the context of long-distance quantum key distribution. These protocols are the original quantum repeater proposal by Briegel, D\"ur, Cirac and Zoller, the so-called hybrid quantum repeater using optical coherent states dispersively interacting with atomic spin qubits, and the Duan-Lukin-Cirac-Zoller-type repeater using atomic ensembles together with linear optics and, in its most recent extension, heralded qubit amplifiers. For our analysis, we investigate the most important experimental parameters of every repeater component and find their minimally required values for obtaining a nonzero secret key. Additionally, we examine in detail the impact of device imperfections on the final secret key rate and on the optimal number of rounds of distillation when the entangled states are purified right after their initial distribution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-08-10 |