Optimal Eavesdropping in Quantum Cryptography. II. Quantum Circuit
arXiv:quant-ph/9702015 · doi:10.1103/PhysRevA.56.1173
Abstract
It is shown that the optimum strategy of the eavesdropper, as described in the preceding paper, can be expressed in terms of a quantum circuit in a way which makes it obvious why certain parameters take on particular values, and why obtaining information in one basis gives rise to noise in the conjugate basis.
7 pages, 1 figure, Latex, the second part of quant-ph/9701039
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