论文标题
实验三态测量设备独立的量子键分布，具有未表征的来源
Experimental Three-State Measurement-Device-Independent Quantum Key Distribution with Uncharacterized Sources
论文作者
论文摘要
由于其高度的安全性和实用性，与测量设备与设备无关的量子密钥分布（MDI-QKD）协议在量子通信中起着重要作用。它可以免疫在检测设备上的所有侧道攻击。但是，该协议在大多数现有的MDI-QKD方案中仍然包含严格的要求，例如，完美的状态准备或完美的来源，在实践中很难意识到这一点。在这封信中，我们通过使用三态方法来研究未表征的MDI-QKD，从而大大降低了有限尺寸的效果。国家准备的唯一要求是国家在双度希尔伯特空间中制备。此外，在170 km传输距离上进行了原理证明，这是记录下相同安全级别下最长的传输距离。
The measurement-device-independent quantum key distribution (MDI-QKD) protocol plays an important role in quantum communications due to its high level of security and practicability. It can be immune to all side-channel attacks directed on the detecting devices. However, the protocol still contains strict requirements during state preparation in most existing MDI-QKD schemes, e.g., perfect state preparation or perfectly characterized sources, which are very hard to realize in practice. In this letter, we investigate uncharacterized MDI-QKD by utilizing a three-state method, greatly reducing the finite-size effect. The only requirement for state preparation is that the state are prepared in a bidimensional Hilbert space. Furthermore, a proof-of-principle demonstration over a 170 km transmission distance is achieved, representing the longest transmission distance under the same security level on record.
