Blind quantum computation with a noise channel

作     者：Yu-Bo Sheng Lan Zhou 

作者机构：Institute of Quantum Information and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China School of Science Nanjing University of Posts and Telecommunications Nanjing 210003 China 

出 版 物：《Physical Review A》 (Phys. Rev. A)

年 卷 期：2018年第98卷第5期

页      面：052343-052343页

核心收录：

基　　金：National Natural Science Foundation of China, NSFC, (11474168) China Postdoctoral Science Foundation, (2018M642293) 

主　　题：Quantum computation 

摘      要：Blind quantum computation (BQC) is a type of quantum computation model. For a client (Alice) who does not have enough sophisticated technology and knowledge to perform universal quantum computation, BQC allows her to resort to a remote quantum computation server (Bob) to delegate universal quantum computation. During the computation, Bob cannot know Alice s inputs, algorithm, and outputs. A single-server BQC protocol requires Alice to prepare and distribute single-photon states to Bob. Unfortunately, the distributed single photons will suffer from noise. The noise not only leads to the decoherence of the single-photon state, but also leads to photon loss. In this protocol, we describe an antinoise single-server BQC protocol. This protocol has three advantages. First, Alice does not require any auxiliary resources, which reduces the client s economic cost. Second, this protocol not only can protect the state from the collective noise, but also can distill the single photon from photon loss. Third, the noise processer in Bob is based on the linear optics so that it is feasible in experiment. This protocol may show that it is possible to perform a single-server BQC protocol in a noise channel.