Quantum and classical advantage distillation are not equivalent

Kaszlikowski, Dagomir; Yang, Lim Jenn; Kwek, L. C.; Englert, Berthold-Georg

Quantum and classical advantage distillation are not equivalent

Authors

Kaszlikowski, Dagomir

Yang, Lim Jenn

Kwek, L. C.

Englert, Berthold-Georg

Description

We report that, for the generation of a secure cryptographic key from correlations established through a noisy quantum channel, the quantum and classical advantage distillation procedures are not equivalent, when coherent eavesdropping attacks are duly taken into account. The quantum procedure can tolerate markedly more noise in the channel than the classical procedure.
3 pages, 1 figure