论文标题
使用微带过滤器实现的超导量子控制的双向转换
Double Upconversion for Superconducting Qubit Control realised using Microstrip Filters
论文作者
论文摘要
超导量子位为实际实现量子计算机大规模实现量子计算机提供了有前途的平台。此类设备需要在微波频率下进行精确控制。常见的做法是使用智商调制，合成此类控制信号，需要校准（i）和正交（q）信号与两个DC偏移量并产生纯音。本文介绍了一种经济的物理实施，其替代方法称为双重转换，该方法需要较少的硬件校准和物理资源才能操作量子。使用标准PCB设计技术为微带过滤器和两个常见的RF混合器创建了物理电路。然后，该电路被用来成功控制超导式的transmon固定量。当使用适当的RF屏蔽时，在transmon Qubit的整个操作范围内，用超过70dB的无伪动态范围来证明量子色调。
Superconducting qubits provide a promising platform for physically realising quantum computers at scale. Such devices require precision control at microwave frequencies. Common practice is to synthesise such control signals using IQ modulation, requiring calibration of a in-phase (I) and quadrature (Q) signals alongside two DC offsets to generate pure tones. This paper presents an economic physical implementation of an alternative method referred to as double upconversion which requires considerably less hardware calibration and physical resources to operate a qubit. A physical circuit was created using standard PCB design techniques for microstrip filters and two common RF mixers. This circuit was then utilised to successfully control a superconducting transmon qubit. When using proper RF shielding, qubit tones were demonstrated with over 70dB of spurious-free dynamic range across the entire operational spectrum of a transmon qubit.
