论文标题
在微波频率下进行量子控制的超导体调制电路
Superconductor modulation circuits for Qubit control at microwave frequencies
论文作者
论文摘要
Qubits的读数和控制是缩放量子计算机的限制因素。理想的解决方案是将靠近Qubits的节能低温电路整合，以执行控制和预处理任务。随着降低较低的功耗和较低的噪声，单通量量子（SFQ）和绝热量子通量参数（AQFP）超导体逻辑家族可以在低温温度下达到最终性能。我们创建了一个基于超导体的片上函数生成器来控制Qubits。根据应用于超导体混合器阶段的外部输入波形，将生成的信号调制至数十万GHz。该电路以4.2k的速度工作。射频（RF）匹配电路在数字扩增和降低降噪后将信号传输到〜MK阶段。
Readout and control of qubits are limiting factors in scaling quantum computers. An ideal solution is to integrate energy-efficient cryogenic circuits close to the qubits to perform control and pre-processing tasks. With orders of magnitude lower power consumption and hence lower noise, Single Flux Quantum (SFQ) and Adiabatic Quantum Flux Parametron (AQFP) superconductor logic families can reach ultimate performance at cryogenic temperatures. We have created a superconductor-based on-chip function generator to control qubits. The generated signal is modulated up to tens of GHz based on the external input waveform applied to the superconductor mixer stage. This circuit works at 4.2K. A radiofrequency (RF) matching circuit transmits the signal to the ~mK stage after digital amplification and noise reduction.
