Kerman Andrew J, Oliver William D
Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts 02420, USA.
Phys Rev Lett. 2008 Aug 15;101(7):070501. doi: 10.1103/PhysRevLett.101.070501. Epub 2008 Aug 12.
We present a scheme for implementing quantum operations with superconducting qubits. Our approach uses a "coupler" qubit to mediate a controllable interaction between data qubits, pulse sequences which strongly mitigate the effects of 1/f flux noise, and a high-Q resonator-based local memory. We develop a Monte Carlo simulation technique capable of describing arbitrary noise-induced dephasing and decay, and demonstrate in this system a set of universal gate operations with O(10(-5)) error probabilities in the presence of experimentally measured levels of 1/f noise. We then add relaxation and quantify the decay times required to maintain this error level.
我们提出了一种使用超导量子比特实现量子操作的方案。我们的方法使用一个“耦合器”量子比特来介导数据量子比特之间的可控相互作用、能显著减轻1/f磁通噪声影响的脉冲序列以及基于高Q谐振器的本地存储器。我们开发了一种蒙特卡罗模拟技术，能够描述任意噪声引起的退相和衰减，并在该系统中展示了一组通用门操作，在存在实验测量的1/f噪声水平时，错误概率为O(10^(-5))。然后我们加入弛豫并量化维持此错误水平所需的衰减时间。
