Extremely efficient clocked electron transfer on superfluid helium

TL;DR

This paper demonstrates highly efficient electron transfer on superfluid helium using silicon technology, achieving over a billion successful cycles with minimal failure, paving the way for scalable quantum computing and communication systems.

Contribution

It introduces a novel silicon-based charge-coupled device for electron transport on superfluid helium with unprecedented efficiency and reliability.

Findings

Over a billion successful electron transfer cycles achieved.

Strong fringing fields ensure minimal transfer failures.

Simultaneous measurement of 120 channels with up to 20 electrons each.

Abstract

Unprecedented transport efficiency is demonstrated for electrons on the surface of micron-scale superfluid helium filled channels by co-opting silicon processing technology to construct the equivalent of a charge-coupled device (CCD). Strong fringing fields lead to undetectably rare transfer failures after over a billion cycles in two dimensions. This extremely efficient transport is measured in 120 channels simultaneously with packets of up to 20 electrons, and down to singly occupied pixels. These results point the way towards the large scale transport of either computational qubits or electron spin qubits used for communications in a hybrid qubit system.