A Bayesian validation approach to practical boson sampling  

作　　者：Zhe Dai Yong Liu Ping Xu WeiXia Xu XueJun Yang JunJie Wu 

机构地区：[1]Institute for Quantum Information&State Key Laboratory of High Performance Computing,College of Computer National University of Defense Technology,Changsha 410073,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2020年第5期39-46,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61632021)。

摘　　要：Boson sampling is a promising candidate for demonstrating quantum supremacy. The validation that involves judging whether a quantum setup outputs photons following the boson sampling model is an essential task in the experiments. However, the current validation methods may result in an incorrect conclusion being reached in realistic experiments, in which no ideally identical photons exist. Accordingly, this study proposes a slope-based approach, which is an extended Bayesian validation, to model the degree of photon indistinguishability. Through numerical simulations and performance evaluations, we demonstrate that the proposed approach can correctly validate boson sampling against the distribution of classical particles. In addition to offering a useful approach for validation, our research indicates that physicists should pay more attention to the quality of photon indistinguishability in boson sampling experiments.Boson sampling is a promising candidate for demonstrating quantum supremacy. The validation that involves judging whether a quantum setup outputs photons following the boson sampling model is an essential task in the experiments. However, the current validation methods may result in an incorrect conclusion being reached in realistic experiments, in which no ideally identical photons exist. Accordingly, this study proposes a slope-based approach, which is an extended Bayesian validation, to model the degree of photon indistinguishability. Through numerical simulations and performance evaluations, we demonstrate that the proposed approach can correctly validate boson sampling against the distribution of classical particles. In addition to offering a useful approach for validation, our research indicates that physicists should pay more attention to the quality of photon indistinguishability in boson sampling experiments.

关 键 词：BOSON sampling quantum SUPREMACY BAYESIAN VALIDATION PHOTON INDISTINGUISHABILITY 

分 类 号：O413[理学—理论物理] O572.31[理学—物理]