A 5.5mW/Channel 2-to-7 GHz Frequency Synthesizable Qubit-Controlling Cryogenic Pulse Modulator for Scalable Quantum Computers

• DOI: 10.23919/vlsicircuits52068.2021.9492343
• Publication Date: 2021-07-28T20:33:42Z
• Authors: Kiseo Kang; ByungJun Kim; Gahyun Choi; Sun-Kyung Lee; Jisoo Choi; Jaeho Lee; Seokhyeong Kang; Moonjoo Lee; Ho-Jin Song; Yonuk Chong; Jae-Yoon Sim
• Keywords: Rabi cycle

This work presents a qubit controller IC based on the direct synthesis. The consists of six independently-working pulse modulators utilizing same LO frequency. We propose sinusoid-shaping nonlinear DAC followed by linear interpolating to improve both energy and hardware efficiencies. implemented in 40nm CMOS is verified superconducting operations with Rabi Ramsey oscillations while consuming power < 1/60 compared previous state-of-the-art.