光子耦合微波腔中的自旋量子比特
Spin Qubits in Photon-Coupled Microwave Cavities
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中文总结 AI 辅助
本文提出一种模块化架构，通过单光子交换波导耦合含有限量子比特的独立微波腔，解决传统量子比特架构缩放时传输幅度降低的问题，为可扩展量子计算硬件提供可行方案。
中文摘要 AI 辅助
微波腔中的电子自旋量子比特为可扩展量子计算硬件提供了有前景的平台，其利用了长相干时间、抗电荷噪声特性以及腔介导的量子比特-量子比特相互作用。虽然通过片上微磁体可实现强自旋-光子耦合机制，但将多个量子比特置于单个共享谐振器内的传统架构缩放会降低传输幅度，从而限制大规模应用的效率。为克服这一局限，本文分析了一种模块化架构：每个包含有限数量量子比特的独立腔通过单光子交换波导耦合。利用输入/输出理论，我们计算了两种及三种耦合腔网络在不同配置下的传输幅度，绘制了通过调节关键系统参数可实现的不同物理机制，为基于腔的可扩展量子自旋量子比特网络提供了可行路径。
英文摘要
Electron spin qubits in microwave cavities provide a promising platform for scalable quantum computing hardware, leveraging long coherence times, charge-noise robustness and cavity mediated qubit-qubit interactions. While the strong spin-photon coupling regime is accessible via on-chip micromagnets, scaling conventional architectures by placing multiple qubits within a single shared resonator degrades transmission amplitudes, hence limiting large-scale efficiency. To overcome this limitation, we analyze a modular architecture where individual cavities containing a limited number of qubits are coupled via single-photon-exchange waveguides. Using input/output theory, we compute the transmission amplitudes for networks of two and three coupled cavities in various configurations. We map out the distinct physical regimes accessible by tuning key system parameters, offering a viable pathway for scalable cavity-based quantum spin qubit networks.
