Initiative for european Semiconductor-based Large-scale Quantum computer

Abstract

QLSI2 brings together the expertise of 23 partners from 9 countries with the ambition to demonstrate a cloud-accessible 200-qubit semiconductor-based quantum computer by the end of 2027. In addition, the consortium aims to demonstrate the implementation of meaningful use cases on this demonstrator. The QLSI2 project will leverage the expertise of key European players (RTOs, academic laboratories, start-ups and large companies) in complementary fields of quantum technologies, from hardware to software, to define and implement a roadmap towards such an ambitious goal.

The roadmap will extend its vision to the entire value chain, including the supply chain. Particular attention will be paid to the industrialisability of the proposed solution in order to keep Europe at the forefront of the race for quantum supremacy for a long time to come. The roadmap will be implemented considering both heterostructure-based and FD-SOI-based routes. In addition, and following these two routes, QLSI2 aims to advance both technology and manufacturing readiness to a level high enough to meet Europe's ambitions for the industrialisation of quantum technologies, with a particular focus on scalability. With these overall objectives and expected outcomes, QLSI2 will have a significant impact on the field towards LSQ.

Objectives

Design, fabricate and characterize the semiconducting QPUs with a size up to 200 qubits
Ensure that the QPUs’ features and technological performance are scalable and responsive to industry needs by demonstrating meaningful use cases
Contribute to the European industrial tissue by designing the appropriate framework for building a European supply chain for developing and producing/manufacturing QPUs

Results

This section highlights the main publications from the QLSI2 consortium that are contributing to reach the ambitious objectives of the project and share knowledge and progress beyond state-of-art. The QLSI2 consortium aims to build awareness in both the scientific and industrial communities but also to inform end-users of the potential of the semiconductor-based quantum technologies. The results report advances in FDSOI and SiGe heterostructures.

Publications

Spin-orbit-enabled realization of arbitrary two-qubit gates on moving spins [2025-08-11]
Fast readout of quantum dot spin qubits via Andreev spins [2025-06-24]
Readout sweet spots for spin qubits with strong spin-orbit interaction [2025-05-21]
Hole-spin qubits in germanium beyond the single-particle regime [2025-05-05]
Transformer models for quantum gate set tomography [2025-01-21]
Quantum geometric protocols for fast high-fidelity adiabatic state transfer [2025-10-31]
Gapless Single-Spin Qubit [2025-11-03]
Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions [2025-08-13]
Color it, Code it, Cancel it: k-local dynamical decoupling from classical additive codes [2025-08-11]
Unifying adiabatic state-transfer protocols with (α, β)-hypergeometries [2025-04-10]
Two-qubit logic and teleportation with mobile spin qubits in silicon [2025-03-19]
Robust and localised control of a 10-spin qubit array in germanium [2025-11-26]
Electrically Tuneable Variability in Germanium Hole Spin Qubits [2025-12-14]
Tracking spin qubit frequency variations over 912 days [2025-12-03]
Parametric longitudinal coupling of a semiconductor charge qubit and a RF resonator [2024-10-26]
Dressed basis sets for the modeling of exchange interactions in double quantum dots [2025-10-30]
Decoherence of electron spin qubit during transfer between two semiconductor quantum dots at low magnetic fields [2025-03-14]

Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union. Neither the European Union nor the granting authority can be held responsible for them.

partners

partners / contact

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

[ CEA ]

France

Cecilia Dupre

QLSi2 Coordinator

INTERUNIVERSITAIR MICRO-ELECTRONICA CENTRUM

[ IMEC ]

Belgium

Clément Godfrin

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

[ CNRS ]

France

Matias Urdampilleta

NEDERLANDSE ORGNISATIE VOOR TOEGEPAST NATUURWETENSCHAPPELIJK ONDERZOEK

[ TNO ]

Netherlands

Gökhan Eris

TECHNISCHE UNIVERSITEIT DELFT

[ TUD ]

Netherlands

Veldhorst Menno

FORSCHUNGSZENTRUM JULICH GMBH

[ FZJ ]

Germany

Hendrik Bluhm

BULL SAS

[ BULL ]

France

Cyril Allouche

QUOBLY

[ QUOBLY ]

France

Xavier Thibault

Thales Research & Technology France

[ THALES ]

France

Kevissen Sellapillay

INFINEON TECHNOLOGIES AG

[ IFD ]

Germany

Sebastian Luber

QBLOX BV

[ QBLOX ]

Netherlands

Damas De Jong

TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

[ VTT ]

Finland

Kirsi Tappura

Fraunhofer-Gesellschaft

[ FHG ]

Germany

Benjamin Lilienthal-Uhlig

University of Konstanz

[ UKON ]

Germany

Guido BURKARD

INSTYTUT FIZYKI POLSKIEJ AKADEMII NAUK

[ IFPAN ]

Poland

Lukasz CYWINSKI

ARQUE Systems GmbH

[ ARQUE ]

Germany

Markus Beckers

PARITY QUANTUM COMPUTING GMBH

[ PARITYQC ]

Austria

Wolfgang LECHNER

BUDAPESTI MUSZAKI ES GAZDASAGTUDOMANYI EGYETEM

[ BME ]

Hungary

Andras Palyi

Q.M. TECHNOLOGIES LTD

[ QDEVIL ]

Israel

Fabio ANSALONI

Semiqon Technologies

[ SEMIQON ]

Finland

Himadri Majumdar

STMICROELECTRONICS SA

[ ST ]

FRANCE

Philippe Galy

ORANGE QUANTUM SYSTEMS OPERATIONAL BV

[ OQS ]

Netherlands

Thorsten Last

Universität Regensburg

[ UREG ]

Germany

Ferdinand Kuemmeth

Show contact persons

graph - chart

Start 01/06/2024

50% 14/02/2026

End 30/11/2027

. M€ Budget allocation

1847 p*m Effort

44 persons Full time equivalent

news

QLSI2 Review Meeting

2026-01-22

QLSI2 2nd General Assembly

2025-11-06

events

documents

contact us

By submitting this form, I agree that the information entered may be used for newsletter subscriptions, information requests and statistical analysis that may result. Under no circumstances will these data be transferred to third parties.
To know and exercise your rights, in particular to withdraw your consent to the use of data collected by this form, please consult our general conditions of use.