Cryogenic High-Frequency Readout and Control Platform for Spin Qubits

TL;DR

This paper presents a cryogenic platform with high-density interconnects for efficient control and readout of spin qubits, supporting multiple frequency ranges and demonstrating promising performance metrics.

Contribution

The paper introduces a modular cryogenic platform with integrated high-bandwidth interconnects tailored for multi-qubit spin qubit devices, enhancing scalability and performance.

Findings

High-density interconnects enable complex qubit control

Signal integrity and crosstalk are within acceptable limits

Platform supports frequencies up to 40 GHz

Abstract

We have developed a cryogenic platform for the control and readout of spin qubits that comprises a high density of dc and radio frequency sample interconnects based on a set of coupled printed circuit boards. The modular setup incorporates 24 filtered dc lines, 14 control and readout lines with bandwidth from dc to above 6 GHz, and 2 microwave connections for excitation to 40 GHz. We report the performance of this platform, including signal integrity and crosstalk measurements and discuss design criteria for constructing sample interconnect technology needed for multi-qubit devices.