Compact frequency multiplexed readout of silicon quantum dots in monolithic FDSOI 28nm technology

TL;DR

This paper presents a novel on-chip frequency multiplexed readout method for silicon quantum dots that eliminates bulky resonators, enabling faster and more scalable quantum device readout in monolithic FDSOI 28nm technology.

Contribution

It introduces the first on-chip frequency multiplexed readout of co-integrated single-electron transistors without resonators, demonstrating high fidelity and rapid measurement.

Findings

Achieved 99.9% fidelity in simultaneous readout

Validated readout within 2.2 microseconds

Demonstrated effective multiplexing with 1MHz frequency spacing

Abstract

This paper demonstrates the first on-chip frequency multiplexed readout of two co-integrated single-electron transistors without the need for bulky resonators. We characterize single electron dynamics in both single electron transistors at 4.2K before validating their simultaneous readout within 2.2{\mu}s, achieving a 99.9% fidelity with a 1MHz frequency spacing. This experimental demonstration paves the way towards resonator-free large-scale quantum-classical architectures that would be required for future universal and reprogrammable quantum computers.