Selective Shuttling of Electrons on Helium Using a CMOS Control Platform

TL;DR

This paper demonstrates the precise control and shuttling of electrons on liquid helium using a CMOS platform, advancing the development of scalable quantum computing with electron spin qubits.

Contribution

It introduces a CMOS-based device capable of selective 2D electron shuttling on helium, enabling scalable quantum information processing.

Findings

Electrons can be shuttled in packets of tens to single electrons.

Shuttling can be repeated over 10^9 times without loss.

The device is scalable for large quantum arrays.

Abstract

Electrons bound to the surface of liquid helium are an emerging quantum computing platform, offering the potential for highly mobile spin qubits that can be manipulated using CMOS-fabricated devices. Here, as a step toward realizing this technology, we demonstrate selective two-dimensional shuttling of electrons across a helium film condensed on the surface of a CMOS control chip. The electrons are moved in packets containing, on average, several tens down to single electrons. We perform CCD-style electron shuttling in any of 128 transport microchannels, each of which links electron storage zones and sensing zones in the 2D plane. Shuttling sequences can be repeated at least 10$^9$ times with no detectable electron loss. The device serves as a prototype quantum information processing platform that is readily scalable to control large monolithically integrated arrays of single electron spins.