Bruss D, Macchiavello C
Institut für Theoretische Physik, Universität Hannover, 30167 Hannover, Germany.
Phys Rev Lett. 2002 Mar 25;88(12):127901. doi: 10.1103/PhysRevLett.88.127901. Epub 2002 Mar 8.
We study optimal eavesdropping in quantum cryptography with three-dimensional systems, and show that this scheme is more secure against symmetric attacks than protocols using two-dimensional states. We generalize the according eavesdropping transformation to arbitrary dimensions, and discuss the connection with optimal quantum cloning.
我们研究了三维系统量子密码学中的最优窃听问题,并表明该方案在抵御对称攻击方面比使用二维态的协议更安全。我们将相应的窃听变换推广到任意维度,并讨论了与最优量子克隆的联系。