PhotonQ - measurement-based photonic quantum processor

PhotonQ brings together seven universities and research institutions as well as industrial partners

In PhotonQ the universities of Stuttgart, Würzburg, Mainz and Ulm, the Technical University of Munich, the Institute for Microelectronics Stuttgart and Vanguard Automation GmbH will develop a photonic quantum processor. The consortia is coordinated by IQST-Board member Stefanie Barz from the Institute for Functional Matters and Quantum Technologies at University of Stuttgart. They bring together expertise in the fields of experimental and theoretical quantum technologies and quantum optics, solid-state physics, microelectronics, optical 3D printing, and the fabrication of photonic chips.

PhotonQ will develop novel components, significantly improve current systems, and bring everything together to generate large entangled photonic states that will form the basis for the photonic quantum processor. The whole quantum processor will be set up and operated at the University of Stuttgart. PhotonQ will demonstrate the feasibility of the measurement-based photonic approach as well as the realisation of quantum algorithms.

PhotonQ is already the second project besides QRyd-Demo at the center for IQST @University of Stuttgart funded under the BMBF's "Quantum Processors and Technologies for Quantum Computers" measure. Both projects and also the other projects on QC in IQST underline the research strength of the IQST fellows in the area of quantum computing. 

The Federal Ministry of Education and Research (BMBF) supports this project with 16,6 Million Euro..
Funding period: 01.01.2022 - 31.12.2025

For more information visit the PhotonQ website

Link Press release University of Stuttgart

QRydDemo - Quantum Computing with Rydberg Atoms

First quantum computer demonstrator based on trapped Rydberg atom arrays

In the collaborative project "QRydDemo" researchers of the 5th Institute of Physics and the Institute for Theoretical Physics III at the University of Stuttgart, the Institute of Complex Quantum Systems at Ulm University and TOPTICA Photonics AG in Gräfeling as a partner from industry want to realize a demonstrator for a Rydberg quantum computer. The consortium is led by Tilman Pfau, 5th Insitute of Physics at University of Stuttgart and IQST Director. For more than 15 years, he has been working with Rydberg atoms, first focusing on pioneering studies of collective many-body phenomena in Rydberg quantum gases, and later on topics ranging from ultralong-range Rydberg molecules, to Rydberg quantum optics in cold and hot vapors. 

The project aims to realize a quantum computer demonstrator with several hundred qubits based on individually controlled Rydberg atoms. In order to reach this goal, Rydberg atoms are grouped in a two dimensional optical trap structure and quantum logical operations are performed by controlled entanglement and shifting the atom traps.

The Federal Ministry of Education and Research (BMBF) supports this project with nine Million Euro, the industry partner contributes another 1.1 Millionen Euro.
Funding period: 01.02.2021 - 31.01.2025

For more information visit the QRydDemo website

Link Press release University of Stuttgart

Collaborative projects within the Competence Center Quantum Computing Baden-Württemberg

Within the Competence Center Quantum Computing BW coordinated by Fraunhofer-IAF, Freiburg and IAO, Stuttgart, in 4 out of 6 funded collaborative projects (2021 -2023)  researchers from the center for IQST are involved:

  • QC-4-BW – Diamond-based spintronic quantum register for a scalable quantum processor (Fedor Jelezko, UUlm and Jörg Wrachtrup, University of Stuttgart)

  • QORA – Quantum optimization using resilient algorithms (Stefanie Barz and Ilia Polian, University of Stuttgart)

  • SEQUOIA – Software engineering of industrial, hybrid quantum applications and algorithm (Frank Leymann, University of Stuttgart)

  • SiQuRe – Modeling and simulation of qubit registers from chains of NV centers on dislocations in diamond (Joachim Ankerhold, UUlm)

SiSiQ - Silicon photonics in secure quantum networks

This project funded by BMBF (2018 -2023) is coordinated by IQST  board member Stefanie Barz, Institute for Functional Matters and Quantum Technologies, University of Stuttgart.

The focus is on novel methods that enable secure computations based on the rules of quantum physics. In order to achieve this, the best of two already established fields, quantum communication and quantum computing will be brought together. The goal is to advance photonic quantum technology and pioneer its use for secure quantum networks.

PlanQK - Platform and Ecosystem for Quantum-assisted Artificial Intelligence

Two IQST fellows participate in PlanQK as research partners: Frank Leymann, Institute for Architecture of Application Systems (IAAS) and Stefanie Barz, Institute for Functional Matter and Quantum Technologies, University of Stuttgart. The whole project consortia consists of 15 partners from industry and academia and is funded through the Federal Ministry for Economic Affairs and Energy as part of the “KI Innovationswettbewerb”.

The project combines artificial intelligence and quantum computing to create a platform for innovative quantum-enhanced Artificial Intelligence (AI) applications and to make it available to small- and medium-sized enterprises (SMEs). 

Q.Link.X - Quantum repeater for secure communication over long distances

The collaborative project Q.Link.X "Quantum Link Extension" aims to realize quantum repeaters for the first time. These are based on three different technical platforms: quantum dots and diamond color center systems as well as a combination of atomic and ionic systems, whose performance is to be tested on test tracks.

The IQST board members Fedor Jelezko, Institute of Quantum Optics, Ulm University and Jörg Wrachtrup, 3rd Institute of Physics, University of Stuttgart, are part of the research consortia. Both are internationally renowned experts for their research in the field of spin-based quantum technologies which range from precision sensing to computation and communication using diamond color centers as quantum systems.

Funded by BMBF 08/2018 - 07/2021.