SOI technology for quantum information processing

TL;DR

This paper discusses progress in developing a scalable quantum processor using silicon-on-insulator technology, encoding qubits in hole spins, and demonstrating manipulation and readout techniques in silicon nanowire devices.

Contribution

It introduces a method for encoding and manipulating hole-spin qubits in FDSOI devices, highlighting their potential for scalable quantum computing.

Findings

Efficient microwave manipulation of hole-spin qubits.

Readout and reinitialization via Pauli blockade.

Potential scalability advantages of FDSOI technology.

Abstract

We present recent progress towards the implementation of a scalable quantum processor based on fully-depleted silicon-on-insulator (FDSOI) technology. In particular, we discuss an approach where the elementary bits of quantum information - so-called qubits - are encoded in the spin degree of freedom of gate-confined holes in p-type devices. We show how a hole-spin can be efficiently manipulated by means of a microwave excitation applied to the corresponding confining gate. The hole spin state can be read out and reinitialized through a Pauli blockade mechanism. The studied devices are derived from silicon nanowire field-effect transistors. We discuss their prospects for scalability and, more broadly, the potential advantages of FDSOI technology.