Optimization of security costs in nested purification protocol

Details Optimization of security costs in nested purification protocol Optimization of security costs in nested purification protocol

2002-02-28

arxiv.org/abs/quant-ph/0202171v1

Physics

Quantum Physics

4 pages and 3 figures

Scientific paper

We analyse security costs in one segment of nested purification protocol in a large quantum cryptography network, employing the quantum switchers and repeaters. We demonstrate that exponential or even super-exponential grow of entanglement resources occurs in dependence on number of the network switchers. For this reason, an optimization in the nested strategy is suggested, preventing a stronger than the exponential grow of entanglement resources.

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