Author(s)

Musheng Jiang, Shihai Sun, Linmei Liang

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A novel counterfactual quantum key distribution scheme was proposed by T.-G. Noh and a strict security analysis has been given by Z.-Q.Yin, in which two legitimate geographical separated couples may share secret keys even when the key carriers are not traveled in the quantum channel. However, there are still plenty of practical details in this protocol that haven’t been discussed yet, which are of significant importance in physical implementation. In this paper, we will give a practical analysis on such kind of counterfactual quantum cryptography in the aspects of quantum bit error rate (QBER) and stabilization. Furthermore, modified schemes are proposed, which can obtain lower QBER and will be much more robust on stabilization in physical implementation.

Counterfactual Quantum Cryptography, Quantum Bit Error rate, Practical Stabilization

M. Jiang, S. Sun and L. Liang, "Practical Stabilization of Counterfactual Quantum Cryptography," Journal of Quantum Information Science, Vol. 1 No. 3, 2011, pp. 116-120. doi: 10.4236/jqis.2011.13016.