Front Cover: Generating Microwave Signals with Enhancive Amplitudes Using Superconductor Single Flux Quantum Pulses for Controlling Quantum Bit (Adv. Quantum Technol. 8/2024)

Abstract

This cover image illustrates the generation of microwave waveforms for qubit control by transforming superconducting single-flux-quantum (SFQ) pulses through a filtering network. The output microwave can be modulated by managing the condition of an SFQ pulse pair. Specifically, the reverse-polarity pulse-pair (RPPP) method enables maximum output amplitude and precise control over the initial phase of the microwave. This approach facilitates on-chip qubit control in a cryogenic environment, significantly reducing thermal noise and interconnecting cables, which is crucial for large-scale quantum computing. For further details see article number 2400001 by Hongxiang Shen, Yuxing He, Nobuyuki Yoshikawa, and co-workers.