A Reconfigurable Cryogenic Platform for the Classical Control of Scalable Quantum Computers

TL;DR

This paper presents a reconfigurable cryogenic FPGA-based platform capable of controlling various solid-state qubits across a wide temperature range, addressing coherence and integration challenges in scalable quantum computing.

Contribution

It introduces a versatile FPGA infrastructure that operates reliably from 4K to 300K, enabling classical control of quantum systems close to the qubits.

Findings

All major FPGA components operate correctly across the temperature range.

Logic speed remains stable over temperature variations.

Integrated ADC performance is stable from cryogenic to room temperature.

Abstract

Recent advances in solid-state qubit technology are paving the way to fault-tolerant quantum computing systems. However, qubit technology is limited by qubit coherence time and by the complexity of coupling the quantum system with a classical electronic infrastructure. We propose an infrastructure, enabling to read and control qubits, that is implemented on a field-programmable gate array (FPGA). The FPGA platform supports functionality required by several qubit technologies and can operate physically close to the qubits over a temperature range from 4K to 300K. Extensive characterization of the platform over this temperature range revealed all major components (such as LUTs, MMCM, PLL, BRAM, IDELAY2) operate correctly and the logic speed is very stable. The stability is finally concretized by operating an integrated ADC with relatively stable performance over temperature.