2000/01/23 by Helle Bechmann-Pasquinucci, Asher Peres · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.85.3313
published as Phys. Rev. Lett. 85 (2000) 3313 · 11 pages Revtex
arxiv created 2000/01/23 · arxiv updated 2009/12/01
We consider quantum cryptographic schemes where the carriers of information are 3-state particles. One protocol uses four mutually unbiased bases and appears to provide better security than obtainable with 2-state carriers. Another possible method allows quantum states to belong to more than one basis. The security is not better, but many curious features arise.