Below-threshold error reduction in single photons through photon distillation
MESA+ Institute for Nanotechnology, University of Twente（特温特大学纳米技术研究所）；NASA Ames Research Center（美国宇航局艾姆斯研究中心）；QuiX Quantum B.V.（QuiX量子有限公司）；USRA Research Institute for Advanced Computer Science（美国大学空间研究协会先进计算机科学研究院）；Dahlem Center for Complex Quantum Systems, Freie Universitat Berlin（柏林自由大学达勒姆复杂量子系统中心）；Fraunhofer Heinrich Hertz Institute（弗劳恩霍夫海因里希赫兹研究所）
F. H. B. Somhorst, J. Saied, N. Kannan, B. Kassenberg, J. Marshall, M. de Goede, H. J. Snijders, P. Stremoukhov, A. Lukianenko, P. Venderbosch, T. B. Demille, A… 展开作者
F. H. B. Somhorst, J. Saied, N. Kannan, B. Kassenberg, J. Marshall, M. de Goede, H. J. Snijders, P. Stremoukhov, A. Lukianenko, P. Venderbosch, T. B. Demille, A. Roos, N. Walk, J. Eisert, E. G. Rieffel, D. H. Smith, J. J. Renema
Photonic quantum computers use the bosonic statistics of photons to construct, through quantum interference, the large entangled states required for measurement-based quantum computation. Therefore, any which-way information present in the photons will degrade quantum interference and introduce errors. While quantum error correction can address such errors in principle, it is highly resource-intensive and operates with a low error threshold, requiring numerous high-quality optical components. We experimentally demonstrate scalable, optimal photon distillation as a substantially more resource-efficient strategy to reduce indistinguishability errors in a way that is compatible with fault-tolerant operation. Photon distillation is an intrinsically bosonic, coherent error-mitigation technique which exploits quantum interference to project single photons into purified internal states, thereby reducing indistinguishability errors at both a higher efficiency and higher threshold than quantum error correction. We observe unconditional error reduction (i.e., below-threshold behaviour) consistent with theoretical predictions, even when accounting for noise introduced by the distillation gate, thereby achieving actual net-gain error mitigation under conditions relevant for fault-tolerant quantum computing. We anticipate photon distillation will find uses in large-scale quantum computers. We also expect this work to inspire the search for additional intrinsically bosonic error-reduction strategies, even for fault-tolerant architectures.
Constant-Overhead Fault-Tolerant Bell-Pair Distillation using High-Rate Codes
Harvard University（哈佛大学）；QuEra Computing Inc.（QuEra计算公司）；Caltech（加州理工学院）；Massachusetts Institute of Technology（麻省理工学院）；The University of Chicago（芝加哥大学）
Quantum correlations and fluctuations in the pulsed light produced by a synchronously pumped optical parametric oscillator below its oscillation threshold
Device-Independent Quantum Secret Sharing Protocol Enhanced by Advantage Distillation
Henan Key Laboratory of Quantum Information and Cryptography（河南省量子信息与密码学重点实验室）；Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China（中国科学技术大学量子信息与量子物理协同创新中心）
QuSoft；Korteweg–de Vries Institute for Mathematics, University of Amsterdam（阿姆斯特丹大学柯特维格-德弗里斯数学研究所）；Institute for Quantum Information and Matter, California Institute of Technology（加州理工学院量子信息与物质研究所）；NEST, Scuola Normale Superiore and Istituto Nanoscienze, Consiglio Nazionale delle Ricerche（意大利国家研究委员会纳米科学研究所与比萨高等师范学院NEST）；Scuola Normale Superiore（比萨高等师范学院）
