Scarani-Acin-Ribordy-Gisin 04协议中与测量设备无关的量子密钥分发
Measurement-device-independent quantum key distribution for Scarani-Acin-Ribordy-Gisin 04 protocol
摘要：
提出了一种与测量设备无关的量子密钥分发（MDI QKD）方案，使BB84完全摆脱了探测器中的任何边信道。与准备和测量QKD一样，在MDI设置中使用其他协议在某些实际情况下将是有利的。在本文中，我们考虑SARG 04协议在MDI设置。制备和测量SARG 04被证明能够产生高达双光子发射事件的密钥。在MDI设置中，我们表明，密钥生成是可能的事件与单光子发射的一方和另一方的单光子发射，但双方的双光子发射事件不能有助于密钥生成。与制备和测量SARG 04方案（其中实验设置与BB 84完全相同）相反，MDI设置中SARG 04的测量设置不能与BB 84相同，因为MDI设置中BB 84的测量设置会导致太多位错误。为了克服这个问题，我们提出了两种替代实验设置，我们模拟得到的关键速率。我们的研究强调了MDI QKD对我们提出的关于实现各种QKD协议的要求。
英文摘要：
The measurement-device-independent quantum key distribution (MDI QKD) was proposed to make BB84 completely free from any side-channel in detectors. Like in prepare & measure QKD, the use of other protocols in MDI setting would be advantageous in some practical situations. In this paper, we consider SARG04 protocol in MDI setting. The prepare & measure SARG04 is proven to be able to generate a key up to two-photon emission events. In MDI setting we show that the key generation is possible from the event with single or two-photon emission by a party and single-photon emission by the other party, but the two-photon emission event by both parties cannot contribute to the key generation. On the contrary to prepare & measure SARG04 protocol where the experimental setup is exactly the same as BB84, the measurement setup for SARG04 in MDI setting cannot be the same as that for BB84 since the measurement setup for BB84 in MDI setting induces too many bit errors. To overcome this problem, we propose two alternative experimental setups, and we simulate the resulting key rate. Our study highlights the requirements that MDI QKD poses on us regarding with the implementation of a variety of QKD protocols.
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