Fast readout for large scale spin-based qubits

TL;DR

This paper demonstrates rapid, scalable readout of silicon spin qubits using gate-based reflectometry, enabling large-scale quantum computing with industry-compatible fabrication.

Contribution

It introduces a fast readout method for silicon double quantum dots with tunable interdot coupling, suitable for large-scale qubit arrays.

Findings

Achieved fast readout of Pauli spin blockade phenomena.

Demonstrated tunability of interdot coupling with a second gate layer.

Showcased compatibility with industry-standard fabrication processes.

Abstract

In this letter, we present fast readout of Pauli spin blockade phenomena and interdot coupling tunability in a silicon double quantum dot (DQD) fabricated using industry-compatible processes. The interdot couplings are tuned with a second self-aligned gate layer. The charge sensing and spin readout are performed by using gate-based reflectometry techniques. The results pave the way for scalable fast readout of large-scale industry-standard manufactured Si spin qubit arrays.