After our first presentation of a cryogen-free ("dry") dilution refrigerator (DR) in 2002, they have become standard mK coolers over the years. It is not so their refrigeration power or base
We aim at developing novel components, experimental techniques, and the theoretical foundations of microwave quantum communication based on the quantum properties of continuous-variable propagating
Superconducting circuits have evolved from a toy to study fundamental light-matter interaction into a prime candidate for scalable quantum computing. In addition to university groups, industry has
Within the project MUNIQC we aim to build a quantum computer demonstrators based on superconducting qubits in close collaboration with the Munich Quantum Valley initiative (MQV). This project is
The Quantum Flagship was launched in 2018 as one of the largest and most ambitious research initiatives of the European Union. With a budget of €1 billion and a duration of 10 years, the flagship
For experiments in the sub-Kelvin temperature regime with high demands for an extremely low level of vibration, a pulse tube precooled dilution refrigerator (DR) is described where the (vibration
Content
Within the seminar "Superconducting Quantum Circuits", students present state-of-the-art developments in modern quantum technology with superconducting quantum circuits. In this field,
The History and Status of Helium Production
On Earth, helium is relatively rare (5.2 ppm by volume in the atmosphere) and, therefore, direct extraction from the atmosphere is too expensive. In 1903,
The Quantum Entrepreneurship Lab (QEL) is a one-semester, project-based course at the Technical University of Munich (TUM), designed to bridge the gap between academic research and industrial
Contactless High Performance Power Transmission
12 March 2021
Superconducting coils boost performance of contactless power transmission
A team led by Technical University of Munich (TUM)
Contactless High Performance Power Transmission
12 March 2021
Superconducting coils boost performance of contactless power transmission
A team led by Technical University of Munich (TUM)
Lithium niobate (LNO) is a well established material for surface acoustic wave (SAW) devices including resonators, delay lines and filters. Recently, multi-layer substrates based on LNO thin films
Germany:
Forschungszentrum Jülich GmbH Bayerische Akademie der Wissenschaften Walther-Meissner-Institute Leibniz Supercomputing Centre Fraunhofer-Gesellschaft zur Förderung der
About us
Mission statement
The Walther-Meißner-Institute for Low Temperature Research (WMI) is a research institute of the Bavarian Academy of Sciences and Humanities (BAdW). It conducts
History
In the following we provide a brief overview of some historical facts about the WMI, its scientific directors, important discoveries made at WMI, as well as the key research directions
Historical Roots
The historical roots of WMI go back to Walther Meißner who founded the "Commission for Low Temperature Research" in 1946 when he was president of BAdW (1946 - 1950). The first
A Brief History of WMI
The scientific roots of WMI go back to Walther Meißner (1882-1974). He was appointed to the Chair of Technical Physics at the TH Munich (now Technical University of Munich) in
The first research activities were started in the Herrsching barracks already in 1946 . After the retirement of Walther Meißner in 1952, Heinz Maier-Leibnitz, who also followed Walther Meißner on
Rudolf Gross conducts research in the field of quantum matter and solid-state quantum systems. He is particularly interested in quantum phenomena in superconducting and magnetic materials. He also
We investigate a nonadiabatic holonomic operation that enables us to entangle two fixed-frequency superconducting transmon qubits attached to a common bus resonator. Two coherent microwave tones are
Quantum science and technology is a vibrant and multidisciplinary field of research at the interface of physics, mathematics, computer science and material science. With over twenty experimental and
Quantum communication is expected to become an important building block of the secure digital infrastructure in our future society. In quantum communication, the exchange of unconditionally secure
Transition metal oxides are of great interest due to their various physical properties (e.g. high temperature superconductivity, colossal magnetoresistance, ferroelectricity, nonlinear optical
Optimization of the Energy Efficiency of Helium Liquefaction Systems
For the operation of a helium liquefaction plant besides operational safety the most crucial figure of merrit is energy
This thesis reports the study of experimental optimal control of superconducting qubits. Common approaches of optimal control utilize numerical models to optimize control shapes that implement
A magnonic spin current crossing a ferromagnet-metal interface is accompanied by spin current shot noise arising from the discrete quanta of spin carried by magnons. In thin films, for example, the
Geometric phases, which accompany the evolution of a quantum system and depend only on its trajectory in state space, are commonly studied in two-level systems. Here, however, we study the adiabatic
New-generation direct searches for low mass dark matter feature detection thresholds at energies well below 100 eV, much lower than the energies of commonly used x-ray calibration sources. This
The CRESST experiment employs cryogenic calorimeters for the sensitive measurement of nuclear recoils induced by dark matter particles. The recorded signals need to undergo a careful cleaning process
In solid state materials, gradients of the electro-chemical potential, the temperature, or the spin-chemical potential drive the flow of charge, heat, and spin angular momentum, resulting in a net
We propose a hybrid quantum computing architecture composed of alternating fluxonium and transmon qubits, that are coupled via transmon tunable couplers. We show that this system offers excellent
Walther-Meißner-Seminar SS 2023
Seminar Program SS 2023
Time: Friday, 11.15 h Place: Seminar Room 143,
Colloquium on Solid State Physics SS2023
Summer Semester 2023
Time: Thursday, 17.15 h Place: Lecture Hall 3, Department of Physics,
Seminar Program SS 2023
Time: Friday, 11.15 h Place: Seminar Room 143, Walther-Meißner-Institute,
Summer Semester 2023
Time: Thursday, 17.15 h Place: Lecture Hall 3, Department of Physics, James-Franck-Str. 1, D-85748 Garching
Dr. Matthias Mergenthaler - IBM Research - Zurich
Effects of surface treatments and UHV packaging on flux tunable transmon qubits
The last two decades have seen significant advances in the
Within the seminar, students give talks on current topics in condensed matter physics. The seminar aims to give a closer look at new developments in condensed matter physics and to show how these
Effects of surface treatments and UHV packaging on flux tunable transmon qubits
The last two decades have seen significant advances in the coherence times of superconducting qubits. However, further
Within the seminar, students give talks on current topics in condensed matter physics. The seminar aims to give a closer look at new developments in condensed matter physics and to show how these
