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Improvement of fidelity on quantum blind signature with imprecise quantum measurement

Quantum signature is used for verifying authenticity, integrity, and non-repudiation of message in communication. Many different quantum signature are proposed, however, almost all of them merely work under the assumption of ideal conditions. At present, the non-idealities in the actual system have attracted great attention of researchers, and they are constantly exploring how to overcome or reduce the adverse effects and constraints. However, the existing results have not thoroughly revealed the problem of "how inaccurate quantum physical operations affect and restrict the performance of quantum communication", which is the point of this project. In this paper, the description of imprecise quantum physical operation is proposed, the fidility of quantum blind signature with imprecise quantum measurement is discussed. Finally, our results show that the phase paremeter Φ and Φ ε has no effect on the fidelity of quantum blind signature and the higher fluctuation of impercise quantum measurement parameter, the lower fidelity will be. We hope that the results of this study will help improve the ability of quantum blind signature experiments in actual quantum systems to resist the influence of inaccurate measurements.