Blind Quantum Computing with Weak Coherent Pulses
Blind Quantum Computing with Weak Coherent Pulses
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DOI：
10.1103/physrevlett.108.200502
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发表时间：
2012-05-18
影响因子：
8.6
通讯作者：
Leverrier, Anthony
中科院分区：
文献类型：
--
作者：
Dunjko, Vedran;Kashefi, Elham;Leverrier, Anthony
通用盲量子计算 (UBQC) 协议 [A. Broadbent、J. Fitzsimons 和 E. Kashefi，第 50 届 IEEE 计算机科学基金会年度研讨会论文集（IEEE 计算机协会，美国加利福尼亚州洛斯阿拉米托斯，2009 年），第 517-526 页] 允许客户端在远程服务器上执行量子计算。在理想的设置中，如果客户端能够生成特定的、随机选择的单个量子位状态，则可以保证完美的隐私。虽然从理论角度来看，这可能构成了尽可能低的量子要求，但从实用角度来看，产生这种长距离发送的状态永远不可能完美实现。我们为 UBQC 引入了 epsilon 盲目性的概念，类似于为其他加密协议开发的 epsilon 安全性概念，使我们能够表征协议在可能的缺陷下的鲁棒性和安全性。我们还提出了一种具有弱相干脉冲的远程盲单量子位准备协议，供客户以委托方式准备任意接近完美随机单量子位状态的量子态。这使我们能够针对任何 epsilon > 0 有效地实现 epsilon 盲 UBQC，即使客户端和服务器之间的通道是任意有损的。
The universal blind quantum computation (UBQC) protocol [ A. Broadbent, J. Fitzsimons, and E. Kashefi, in Proceedings of the 50th Annual IEEE Symposiumon Foundations of Computer Science (IEEE Computer Society, Los Alamitos, CA, USA, 2009), pp. 517-526.] allows a client to perform quantum computation on a remote server. In an ideal setting, perfect privacy is guaranteed if the client is capable of producing specific, randomly chosen single qubit states. While from a theoretical point of view, this may constitute the lowest possible quantum requirement, from a pragmatic point of view, generation of such states to be sent along long distances can never be achieved perfectly. We introduce the concept of epsilon blindness for UBQC, in analogy to the concept of epsilon security developed for other cryptographic protocols, allowing us to characterize the robustness and security properties of the protocol under possible imperfections. We also present a remote blind single qubit preparation protocol with weak coherent pulses for the client to prepare, in a delegated fashion, quantum states arbitrarily close to perfect random single qubit states. This allows us to efficiently achieve epsilon-blind UBQC for any epsilon > 0, even if the channel between the client and the server is arbitrarily lossy.