Implementation of a two-state quantum bit commitment protocol in optical fibers
Implementation of a two-state quantum bit commitment protocol in optical fibers
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DOI：
10.1088/2040-8978/18/1/015202
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发表时间：
2016-01-01
影响因子：
2.1
通讯作者：
Pinto, A. N.
中科院分区：
文献类型：
--
作者：
Almeida, A. J.;Stojanovic, A. D.;Pinto, A. N.
我们通过实验证明了一个两态量子比特承诺协议的可行性，该协议既具有隐藏性又具有部分约束力，假设技术限制。该协议的安全性是基于缺乏长期稳定的量子存储器。我们使用偏振编码方案和光纤作为量子信道。得到了承诺的测量概率，并证明了最优欺骗策略。在使用等基进行测量的情况下，诚实玩家的平均成功率在测量直线基时为93.4%，在测量对角基时为96.7%。在不同的基准上进行测量的情况下，当测量直线基准时的比率为52.9%，当测量对角线基准时的比率为55.4%。最佳作弊策略的平均成功率分别为80%和73.8%，远低于诚实玩家的成功率。使用严格的数值有效性标准，我们表明，这些实验值，该协议是安全的。
We demonstrate experimentally the feasibility of a two-state quantum bit commitment protocol, which is both concealing and partially binding, assuming technological limitations. The security of this protocol is based on the lack of long-term stable quantum memories. We use a polarization-encoding scheme and optical fiber as a quantum channel. The measurement probability for the commitment is obtained and the optimal cheating strategy demonstrated. The average success rates for an honest player in the case where the measurements are performed using equal bases are 93.4%, when the rectilinear basis is measured, and 96.7%, when the diagonal basis is measured. The rates for the case when the measurements are performed in different bases are 52.9%, when the rectilinear basis is measured, and 55.4% when the diagonal basis is measured. The average success rates for the optimal cheating strategy are 80% and 73.8%, which are way below the success rates of an honest player. Using a strict numerical validity criterion, we show that, for these experimental values, the protocol is secure.