arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.07617quant-ph
收藏

一种低噪声片上相干微波源

A low-noise on-chip coherent microwave source

Chengyu Yan, Juha Hassel, Visa Vesterinen, Jinli Zhang, Joni Ikonen, Leif Grönberg, Jan Goetz, Mikko Möttönen

摘要:

在微波域中操作的量子计算机的规模扩大需要先进的控制电子设备,并且使用在量子设备的温度下操作的集成组件是潜在有益的。然而,这种方法需要超低功耗和高信号质量,以确保量子相干操作。在这里,我们报告了一个片上器件,是基于一个约瑟夫森结耦合到一个螺旋谐振器,并能够相干连续波微波发射。我们表明,该设备的特性准确地遵循的理论基础上的微扰处理的电容并联约瑟夫森结作为一个增益元件。典型的量子门操作的失真由于该低温25 pW微波源的相位噪声小于0.1%,直到10 ms的演化时间,这低于由在最先进的超导量子比特中的失相引起的失真。结合未来的低温幅度和相位调制技术,我们的方法可能会导致量子处理器的可扩展低温控制系统。

英文摘要:

The scaleup of quantum computers operating in the microwave domain requires advanced control electronics, and the use of integrated components that operate at the temperature of the quantum devices is potentially beneficial. However, such an approach requires ultra-low power dissipation and high signal quality in order to ensure quantum-coherent operations. Here, we report an on-chip device that is based on a Josephson junction coupled to a spiral resonator and is capable of coherent continuous-wave microwave emission. We show that characteristics of the device accurately follow a theory based on a perturbative treatment of the capacitively shunted Josephson junction as a gain element. The infidelity of typical quantum gate operations due to the phase noise of this cryogenic 25-pW microwave source is less than 0.1% up to 10-ms evolution times, which is below the infidelity caused by dephasing in state-of-the-art superconducting qubits. Together with future cryogenic amplitude and phase modulation techniques, our approach may lead to scalable cryogenic control systems for quantum processors.

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。

↑