Signatures of incoherence in a quantum information processor
Michael K. Henry, Alexey V. Gorshkov, Yaakov S. Weinstein, Paola Cappellaro, Joseph Emerson, Nicolas Boulant, Jonathan S. Hodges, Chandrasekhar Ramanathan, Timo… 展开作者
Michael K. Henry, Alexey V. Gorshkov, Yaakov S. Weinstein, Paola Cappellaro, Joseph Emerson, Nicolas Boulant, Jonathan S. Hodges, Chandrasekhar Ramanathan, Timothy F. Havel, Rudy Martinez, David G. Cory
Incoherent noise is manifest in measurements of expectation values when the underlying ensemble evolves under a classical distribution of unitary processes. While many incoherent processes appear decoherent, there are important differences. The distribution functions underlying incoherent processes are either static or slowly varying with respect to control operations and so the errors introduced by these distributions are refocusable. The observation and control of incoherence in small Hilbert spaces is well known. Here we explore incoherence during an entangling operation, such as is relevant in quantum information processing. As expected, it is more difficult to separate incoherence and decoherence over such processes. However, by studying the fidelity decay under a cyclic entangling map we are able to identify distinctive experimental signatures of incoherence. This result is demonstrated both through numerical simulations and experimentally in a three qubit nuclear magnetic resonance implementation.
Qubit error bursts in superconducting quantum processors of Quantum Inspire: quasiparticle pumping and anomalous time dependence
QuTech and Kavli Institute of Nanoscience, Delft University of Technology（代尔夫特理工大学量子纳米科学卡弗里研究所和QuTech）；Netherlands Organisation for Applied Scientific Research (TNO)（荷兰应用科学研究组织（TNO））；Faculty of Electrical Engineering, Mathematics, and Computer Science, Delft University of Technology（代尔夫特理工大学电气、数学与计算机科学学院）
Scalable suppression of heating errors in large trapped-ion quantum processors
Center on Frontiers of Computing Studies, School of Computer Science, Peking University（北京大学计算机学院前沿计算研究中心）；Key Laboratory of Atomic and Subatomic Structure and Quantum Control (Ministry of Education), Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, School of Physics, South China Normal University（华南师范大学物理学院原子与亚原子结构及量子控制教育部重点实验室、广东省物质结构与基本相互作用卓越基础研究基地）；Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University（华南师范大学前沿物理研究院广东量子工程与量子材料重点实验室、粤港澳量子物质联合实验室）
Probing many-body localization crossover in quasiperiodic Floquet circuits on a quantum processor
RIKEN Center for Computational Science（理化学研究所计算科学中心）；RIKEN Center for Quantum Computing（理化学研究所量子计算中心）；RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences（理化学研究所交叉理论与数学科学中心）；RIKEN Pioneering Research Institute（理化学研究所先驱研究所）；Jožef Stefan Institute（约热·斯特凡研究所）；University of Ljubljana（卢布尔雅那大学）
Interacting non-Hermitian edge and cluster bursts on a digital quantum processor
Harvard University（哈佛大学）；Agency for Science, Technology and Research (A*STAR)（科学技术研究局）；National University of Singapore（新加坡国立大学）；Massachusetts Institute of Technology（麻省理工学院）；Institute of High Performance Computing (IHPC)（高性能计算研究所）；Singapore University of Technology and Design（新加坡科技设计大学）
Quantum-State Texture Dynamics: Theory and Experiment
Universidade Federal do ABC（阿巴克联邦大学）；Southern University of Science and Technology（南方科技大学）；Quantum Science Center of Guangdong-HongKong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Universidade Federal de Pernambuco（伯南布哥联邦大学）
