arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.5541quant-phcond-mat.mes-hallcond-mat.supr-con
收藏

超导量子比特中的先驱态制备

Heralded state preparation in a superconducting qubit

J. E. Johnson, C. Macklin, D. H. Slichter, R. Vijay, E. B. Weingarten, John Clarke, I. Siddiqi

摘要:

我们展示了高保真度,量子非破坏性,单次读出的超导磁通量子比特中的指针状态分布可以解决到低于1000分之一。在弱激发状态下,连续测量允许使用预示以确保初始化到基准状态,例如基态。该程序通过抑制由于伪热布居引起的误差将读出保真度提高到93.9%。此外,预示可能实现简单、快速的量子位重置协议,而无需改变系统参数以诱导Purcell弛豫。

英文摘要:

We demonstrate high-fidelity, quantum nondemolition, single-shot readout of a superconducting flux qubit in which the pointer state distributions can be resolved to below one part in 1000. In the weak excitation regime, continuous measurement permits the use of heralding to ensure initialization to a fiducial state, such as the ground state. This procedure boosts readout fidelity to 93.9% by suppressing errors due to spurious thermal population. Furthermore, heralding potentially enables a simple, fast qubit reset protocol without changing the system parameters to induce Purcell relaxation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑