可调谐耦合至谐振子的量子比特驱动动力学与旋转回波
超导电性
2012-05-01 v1 量子物理
摘要
我们研究了可调谐耦合至微波谐振器的超导磁通量子比特的驱动动力学。我们发现，量子比特经历了一个由谐振器非共振驱动介导的振荡场，导致量子比特拉比频率发生显著改变。这开启了一个额外的噪声通道，我们发现耦合参数中的低频噪声会导致驱动演化过程中相干时间的减少。这种噪声可以通过旋转回波 (rotary-echo) 脉冲序列来减轻，对于驱动系统而言，该类比于 Hahn 回波序列。
引用
@article{arxiv.1201.6341,
title = {Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator},
author = {Simon Gustavsson and Jonas Bylander and Fei Yan and Pol Forn-Díaz and Vlad Bolkhovsky and Danielle Braje and George Fitch and Khalil Harrabi and Donna Lennon and Jovi Miloshi and Peter Murphy and Rick Slattery and Steven Spector and Ben Turek and Terry Weir and Paul B. Welander and Fumiki Yoshihara and David G. Cory and Yasunobu Nakamura and Terry P. Orlando and William D. Oliver},
journal= {arXiv preprint arXiv:1201.6341},
year = {2012}
}