Cryogenic high-frequency readout and control platform for spin qubits

Area of Science:

• Quantum Computing
• Cryogenic Engineering
• Materials Science

Background:

• Spin qubits are a promising platform for quantum computing.
• Efficient control and readout of spin qubits require advanced cryogenic hardware.
• Existing interconnect technologies face limitations in density and bandwidth.

Purpose of the Study:

• To develop and characterize a novel cryogenic platform for spin qubit control and readout.
• To demonstrate a high-density interconnect solution for multi-qubit devices.
• To provide design insights for future quantum interconnect technologies.

Main Methods:

• Development of a modular cryogenic platform with coupled printed circuit boards.
• Integration of 24 filtered dc lines, 14 control/readout lines (dc to >6 GHz), and 2 microwave connections (up to 40 GHz).
• Performance evaluation through signal integrity and crosstalk measurements.

Main Results:

• The platform successfully integrates a high density of dc and RF interconnects.
• Signal integrity and crosstalk were measured to validate performance.
• The design facilitates scalable control and readout for multi-qubit systems.

Conclusions:

• The developed cryogenic platform meets the demanding requirements for spin qubit operation.
• The modular design and interconnect strategy are crucial for advancing multi-qubit device integration.
• This work lays the foundation for robust quantum interconnects in scalable quantum computers.