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arXiv 1606.01031quant-ph
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用于量子微波场的快速片上路由的超导开关

Superconducting switch for fast on-chip routing of quantum microwave fields

M. Pechal, J. -C. Besse, M. Mondal, M. Oppliger, S. Gasparinetti, A. Wallraff

摘要:

能够在低温下路由微波信号的开关是应用物理学的许多领域中的最先进实验的期望组件,包括但不限于工程量子系统中的量子信息处理、通信和基础研究。传统的机械开关提供低插入损耗,但通过散热干扰稀释低温恒温器的操作和相关实验。基于半导体或微机电系统的开关具有较低的热预算,但不容易与当前的超导电路集成。在这里,我们设计和测试的片上开关相结合的可调谐传输线谐振器与微波分束器。该装置是超导的,因此耗散的热量可以忽略不计。它与当前的超导电路制造技术兼容,以超过$100\,\mathrm{MHz}$的带宽工作,能够处理$10^{5}\,μ\mathrm{s}^{-1}$量级的光子通量,相当于超过$-90\,\mathrm{dBm}$的功率,并且可以在大约$6-8\,\mathrm{ns}$内切换。我们成功地证明了该设备在量子制度的操作,通过将其集成在一个芯片上的单光子源,并使用它来路由非经典巡回微波场在单光子水平。

英文摘要:

A switch capable of routing microwave signals at cryogenic temperatures is a desirable component for state-of-the-art experiments in many fields of applied physics, including but not limited to quantum information processing, communication and basic research in engineered quantum systems. Conventional mechanical switches provide low insertion loss but disturb operation of dilution cryostats and the associated experiments by heat dissipation. Switches based on semiconductors or microelectromechanical systems have a lower thermal budget but are not readily integrated with current superconducting circuits. Here we design and test an on-chip switch built by combining tunable transmission-line resonators with microwave beam-splitters. The device is superconducting and as such dissipates a negligible amount of heat. It is compatible with current superconducting circuit fabrication techniques, operates with a bandwidth exceeding $100\,\mathrm{MHz}$, is capable of handling photon fluxes on the order of $10^{5}\,μ\mathrm{s}^{-1}$, equivalent to powers exceeding $-90\,\mathrm{dBm}$, and can be switched within approximately $6-8\,\mathrm{ns}$. We successfully demonstrate operation of the device in the quantum regime by integrating it on a chip with a single-photon source and using it to route non-classical itinerant microwave fields at the single-photon level.

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。

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