基于悬浮同轴谐振器的超导量子存储器
Superconducting Quantum Memory with a Suspended Coaxial Resonator
AI总结：
本文提出一种由介电支架在3D封装内支撑薄膜导体的悬浮同轴谐振器设计，结合了块状腔体低损耗与薄膜高材料品质优势，并集成transmon量子比特实现单光子寿命超1毫秒的量子存储器，为模块化扩展提供优势。
摘要：
存储量子信息的一种极具前景的方法是将其编码在微波谐振器的玻色子激发中。这能提供长的相干时间、低的退相干率，以及一种硬件高效的量子纠错方法。制造超导微波谐振器主要有两种方法：传统上是从块状材料中加工出来，以及通过光刻在芯片上制备薄膜。3D谐振器具有较少的损耗通道和更大的模式体积，因此在有损部分中的参与度较小，但达到高材料品质可能具有挑战性。片上谐振器可以使用低损耗薄膜，但将场更紧密地限制，导致更高的参与度以及来自介电衬底的额外损耗通道。在这项工作中，我们提出了一种设计，其中介电支架在3D封装内支撑薄膜导体，从而将块状加工腔体的低表面参与度与薄膜电路的高质量和对材料的控制相结合。通过集成一个包含transmon量子比特的独立芯片，我们实现了一种量子存储器，并测量到单光子寿命超过一毫秒。这种混合3D架构在扩展性方面具有多项优势，因为它降低了封装的重要性，并允许使用可单独替换的量子比特和谐振器器件进行模块化构建。
英文摘要：
A promising way to store quantum information is by encoding it in the bosonic excitations of microwave resonators. This provides for long coherence times, low dephasing rates, as well as a hardware-efficient approach to quantum error correction. There are two main methods used to make superconducting microwave resonators: traditionally machined out of bulk material, and lithographically fabricated on-chip in thin film. 3D resonators have few loss channels and larger mode volumes, and therefore smaller participations in the lossy parts, but it can be challenging to reach high material qualities. On-chip resonators can use low-loss thin films, but confine the field more tightly, resulting in higher participations and additional loss channels from the dielectric substrate. In this work, we present a design in which a dielectric scaffold supports a thin-film conductor within a 3D package, thus combining the low surface participations of bulk-machined cavities with the high quality and control over materials of thin-film circuits. By incorporating a separate chip containing a transmon qubit, we realize a quantum memory and measure single-photon lifetimes in excess of a millisecond. This hybrid 3D architecture has several advantages for scaling, as it relaxes the importance of the package and permits modular construction with separately-replaceable qubit and resonator devices.
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。
