Decoy States and Two Way Quantum Key Distribution Schemes

Details Decoy States and Two Way Quantum Key Distribution Schemes Decoy States and Two Way Quantum Key Distribution Schemes

2010-06-09

arxiv.org/abs/1006.1693v2

Physics

Quantum Physics

Much revised from original manuscript. Accepted for publication in Optics Communications (some variations may exist in some wo

Scientific paper

We study the possible application of the decoy state method on a basic two way quantum key distribution (QKD) scheme to extend its distance. Noting the obvious advantage of such a QKD scheme in allowing for single as well as double photon contributions, we derive relevant lower-bounds on the corresponding gains in a practical decoy state implementation using two intensities for decoy states. We work with two different approaches in this vein and compare these with an ideal infinite decoy state case as well as the simulation of the original.

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