We analyze in detail the so-called "pushing gate" for trapped ions, introducing a time dependent harmonic approximation for the external motion. We show how to extract the average fidelity for the gate from the resulting semi-classical simulations. We characterize and quantify precisely all types of errors coming from the quantum dynamics and reveal for the first time that slight nonlinearities in the ion-pushing force can have a dramatic effect on the adiabaticity of gate operation. By means of quantum optimal control techniques, we show how to suppress each of the resulting gate errors in order to reach a high fidelity compatible with scalable fault-tolerant quantum computing.
Measurement-Based Fault-Tolerant Quantum Computation on High-Connectivity Devices: A Resource-Efficient Approach toward Early FTQC
QunaSys Inc.（QunaSys公司）；Graduate School of Engineering Science, The University of Osaka（大阪大学工学研究科）；Graduate School of Informatics, Kyoto University（京都大学情报学研究科）；Center for Quantum Information and Quantum Biology, The University of Osaka（大阪大学量子信息与量子生物学中心）；RIKEN Center for Quantum Computing (RQC)（理化学研究所量子计算中心）
Protecting bosonic codes from ancilla-induced errors with continuous-variable flags
Alice & Bob（爱丽丝与鲍勃）；Laboratoire de Physique de l’École Normale Supérieure, Inria, ENS, Mines ParisTech, Université PSL, Sorbonne Université（巴黎高等师范学院物理实验室、法国国家信息与自动化研究所、巴黎高等师范学院、巴黎矿业学院、巴黎文理研究大学、索邦大学）；RIKEN Center for Quantum Computing (RQC)（理化学研究所量子计算中心）
Quantum error correction beyond $SU(2)$: spin, bosonic, and permutation-invariant codes from convex geometry
University of Maryland, College Park（马里兰大学帕克分校）；Joint Center for Quantum Information and Computer Science, NIST/University of Maryland, College Park（美国国家标准与技术研究院/马里兰大学联合量子信息与计算科学中心）
