TOUR 1 – Quantum- and Nanometrology, Braunschweig

The Laboratory for Emerging Nanometrology (LENA) at TU Braunschweig is at the forefront of advancing quantum and nanometrology research in the region by integrating state-of-the-art analytical infrastructure, including High-Resolution Transmission Electron Microscopy (TEM) and various other cutting-edge tools. One compelling area of exploration involves the study of Gallium Nitride (GaN)-based semiconductor nanostructures, aimed at unlocking their potential as key components for future Ion-Trap Quantum Computers. Therefore, LENA is one of the key locations for the collaboration within the regional network QVLS and the Cluster of Excellence QuantumFrontiers.

Contact: Thorben Dammeyer, LENA, t.dammeyer@tu-braunschweig.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes roundtrip bus ride from Hannover to Braunschweig and back)
Max. Participants: 24

TOUR 2 – Quantum Device Innovations, Braunschweig

On this tour at TU Braunschweig you will have an overview presentation of integrated circuit design for trapped ion research at the Institute for CMOS Design. The presentation focuses on microwave generation for the qubit logic area in a QCCD-type quantum processor architecture as advanced in QVLS-Q1.
During the presentation, participants get an overview of the integrated chip design flow, starting from schematic level design, simulations, verification, measurement preparation, and measurement.
After the presentation, participants are guided through our laboratory, where we showcase first integrated chip prototypes, measurement equipment, and THz probe system.

Contact: Peter Toth, TU Braunschweig, p.toth@tu-braunschweig.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes bus ride from Hannover to Braunschweig and back)
Max. Participants: 12

TOUR 3 – Quantum Sensors for Fundamental Physics, Braunschweig

Optical clocks are the most precise measurement instruments currently available. As such, they are well-suited to test our knowledge of physics to a high degree and search for possible small effects due to “new physics”, i.e. physics beyond the standard model. At PTB, Germany’ National Metrology Institute, different types of optical clocks are investigating questions such as “Are the fundamental constants really constant?”, “Is there a preferred direction in space?”, or “What makes up dark matter?” within the framework of DQ-mat and the Cluster of Excellence QuantumFrontiers. Additionally, new types of clocks which promise even higher sensitivities in the quest to answer some of these questions are being developed. The tour aims to provide insight into these activities with visits to several different optical clock laboratories at PTB.

Contact: Melina Filzinger, PTB, melina.filzinger@ptb.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes bus ride from Hannover to Braunschweig and back)
Max. Participants: 12

TOUR 4 – Laser and Quantum Radiometry and the Niedersachsen Quantum Link, Braunschweig

At PTB, Germany’s National Metrology Institute, the working groups “Laser and quantum radiometry” and “Frequency dissemination with fibers” collaborate to realize quantum communication along the Niedersachsen Quantum Link. The Niedersachsen Quantum Link is an important testbed for carrying out research and to provide services to industry within the framework of regional, German and European partnerships.  This tour includes visiting labs researching efficient single-photon sources for radiometric and quantum metrological applications and the characterization of single-photon detectors. In addition, this tour visits labs demonstrating optical frequency transmission between Hannover and Braunschweig. 

Contact: Linus Krieg, PTB, linus.krieg@ptb.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes bus ride from Hannover to Braunschweig and back)
Max. Participants: 10 

TOUR 5 – Ion-based Quantum Computing, Braunschweig

On this tour, you will see an ion-trap quantum logic setup on which we have recently demonstrated a universal computation register for an ion-trap quantum computer. We will show you how elementary quantum gates are implemented in our fully chip-integrated approach. We will discuss with you different approaches to scaling ion trap quantum computers. You will be able to observe ion loading and elementary quantum logic gate operations on the experimental setup. We will provide an introduction to the underlying chip technology and introduce you to the demonstrator quantum computers that are currently under construction for the QVLS-Q1 project (funded by the Volkswagen foundation and the ministry of Science and Education in Lower Saxony) and the ATIQ project (funded by the federal ministry of Research and Education – BMBF). 

Contact:  Ludwig Krinner, PTB, ludwig.krinner.ext@ptb.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes bus ride from Hannover to Braunschweig and back)
Max. Participants: 12 

TOUR 6 – Electrical Quantum Metrology and QT Technology Transfer, Braunschweig

In this tour, PTB, Germany’s National Metrology Institute, presents two labs on electrical quantum metrology and a short introduction on quantum technology transfers initiatives at the Quantum Technology Competence Center (QTZ) of PTB. The first stop of the lab tour will be on superconducting quantum circuits, like a cryogenic microwave setup for superconducting qubits and parametric amplifiers. The second lab visit will cover electrical quantum standards, like Josephson Voltage Sources and Quantum Hall Resistance. An overview of all quantum technology transfer related initiatives of QTZ will be presented afterwards.

Contact: Thomas Gerster, PTB, thomas.gerster@ptb.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 18:00 (includes bus ride from Hannover to Braunschweig and back)
Max. Participants: 12

TOUR 7 – Quantum- and Nanometrology, Hannover

Leibniz Universität Hannover’s internationally visible core research topics are in mechanical engineering, in quantum optics and gravitational physics, in biomedical research and in teacher training. Research on these core topics is reflected by excellent infrastructure and strong interdisciplinary, third-party funding at Leibniz Universität Hannover. Both aspects will be highlighted on this tour. On this tour you will visit the buildings HITec – Hannover Institute of Technology and LNQE – Laboratory of Nano and Quantum Engineering. Within HITec and LNQE you will visit unique large-scale facilities (VLBAI – Very Long-Base Atom Interferometer, Einstein Elevator, Optical Clocks) and state-of-the-art laboratories. The research in these buildings showcases the regional collaborative research activities within the Cluster of Excellence QuantumFrontiers, the Collaborative Research Centre DQ-mat and the research network QVLS – Quantum Valley Lower Saxony. 

Contact: Fritz Schulze Wischeler, LNQE, Schulze-Wischeler@LNQE.uni-hannover.de and Alexander Wanner, HITec, alexander.wanner@quest.uni-hannover.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:00 (includes 20 minutes of walking)
Max. Participants: 15

TOUR 8 – Laser Interferometry for Gravitational-wave Detection and Beyond, Hannover

The Max Planck Institute for Gravitational Physics (Albert Einstein Institute) and Institute for Gravitational Physics at Leibniz Universität is the largest research institute in the world specializing in general relativity and beyond and it closely collaborates with the Institute for Gravitational Physics at Leibniz Universität Hannover. The institute is a member of the collaborative research center TerraQ in the area of metrology and modelling for space gravimetry. In the Cluster of Excellence Quantum Frontiers members of the institutes develop laser interferometry at the quantum limit and beyond. Furthermore, researchers at the LUH institute contribute to quantum machine learning efforts for QVLS-Q1.

Contacts: before the event: Benjamin Knispel, Max Planck Institute for Gravitational Physics, benjamin.knispel@aei.mpg.de
On the day of the event: Benno Willke, Max Planck Institute for Gravitational Physics, benno.willke@aei.mpg.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:00 (includes 20 minutes of roundtrip walking)
Max. Participants: 12 

TOUR 9 – Solid State Physics and the Niedersachsen Quantum Link, Hannover

On this tour you will visit the Institute of Solid-State Physics at the Leibniz Universität Hannover. The research at the Institute for Solid State Physics deals with the interactions of electrons and photons with solid materials such as semiconductors. One goal is to examine and understand the underlying physical principles. The developed methods and materials are then optimized for practical application. The focus lies on the physics of low-dimensional systems such as two-dimensional materials, molecules or quantum dots and these systems are embedded and tested in the Niedersachen Quantum Link, which connects the Institute of Solid-State Physics and the PTB in Braunschweig. Furthermore, the institute is strongly engaged in battery and solar energy research.

Contact: Eddy Rugeramigabo, Leibniz Universität Hannover, rugeramigabo@fkp.uni-hannover.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:00
Max. Participants: 10

TOUR 10 – Quantum Education and Outreach, Hannover

Transferring the aims or results of research projects in modern physics to the general public is challenging because the questions are highly specialised and far away from the everyday realities of the general public. The out-of-school lab foeXlab meets this challenge by linking not the projects’ concrete content but methods and prototypical ways of thinking of researchers with the learning objectives of upper school physics lessons. The core offer is to make interferometry, as a method of research, experienceable hands-on for students. The school lab thus complements regular physics lessons, where interferometry is usually only taught in theory.

Contact: Oliver Burmeister, Leibniz Universität Hannover
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:00 (includes 20 minutes of walking) 
Max. Participants: 5

TOUR 11 – Quantum Device Innovations and Technology Transfer, Hannover

Within the framework of the Cluster of Excellence QuantumFrontiers, the regional network QVLS and the Clusters4Future QVLS-iLabs, the Institute of Micro Production Technology (IMPT) deals with quantum systems, among others for the fields of quantum metrology and geodesy. On this tour an overview will be given of IMPT’s activities not only in fundamental research but also in the transition to commercial products. The path from laboratory operation to mobile applications in the field or on-board aircraft or satellites requires miniaturization of the overall systems. The vision is to evolve from a micro-electro-mechanical system (MEMS) to a micro-quantum system (MQS) that combines all the functions needed to operate a quantum system. In addition to the core components (e.g. atom chip), this also includes all peripheral systems.

Contact: Alexander Kassner, IMPT, kassner@impt.uni-hannover.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:30 (includes 30 minutes of roundtrip travel to Garbsen and back)
Max. Participants: 12 

TOUR 12 – Laser Zentrum Hannover, Technology Transfer and Industry Partnerships, Hannover

As an independent, non-profit research institute, the Laser Zentrum Hannover e.V. (LZH) stands for innovative research, development, and consulting in the field of photonics and laser technology. The tour will give an impression of the LZH’s activities within Quantum Frontiers, e.g. gravitational wave detection, and projects with and for companies.

Contact: Sandra Westphal, LZH, S.Westphal@lzh.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 16:30 (includes bus ride from Hannover to Laser Zentrum Hannover and back)
Max. Participants: 35

TOUR 13 – Quantum sensors for space applications

Earth observation is one of the most important tools for understanding climate change, assessing countermeasures, identifying future developments at an early stage, and providing necessary, local, targeted support. The Institute of Satellite Geodesy and Inertial Sensor Technology of the German Aerospace Center (DLR e.V.) is primarily dedicated to research and development of new ways to observe the Earth’s gravitational field.
The tour will cover the INTENTAS, a collaborative project including DLR and Leibniz University Hannover, where a compact atomic sensor is developed to provide entanglement-enhanced sensitivities for future space-borne atom interferometers. The compact sensor will be tested in the microgravity environment provided by HITec’s Einstein Elevator.

Contact: Carsten Klempt, DLR, carsten.klempt@dlr.de
Meeting point: Front steps of Welfengarten 1
Start – End: 13:00 – 15:30 (includes 20 minutes of walking)
Max. Participants: 15