The interrelation of various instabilities characterizes all unconventional superconductors. Here, we show that the characteristic scaling of a marginal Fermi liquid is present in inelastic light
Quantum algorithms often benefit from the ability to execute multi-qubit (>2) gates. To date such multi-qubit gates are typically decomposed into single- and two-qubit gates, particularly in
We describe a unified quantum approach for analyzing the scattering coefficients of superconducting microwave resonators with a variety of geometries, and demonstrate its consistency with the
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
With the availability of additional laboratory space and the success of the WMI in Germany's Excellence Initiative (2006-2018), Excellence Strategy (starting from 2019), and other third-party
R. Doll, M. Näbauer, Experimental Proof of Magnetic Flux Quantization in a Superconducting Ring, Phys. Rev. Lett. 7, 51-52 (1961).
F. Gross, B.S. Chandrasekhar, D. Einzel, K. Andres, P.J. Hirschfeld, H.R. Ott, J. Beuers, Z. Fisk, J.L. Smith, Anomalous Temperature Dependence of the Magnetic Field Penetration Depth in
Basic Research: quantum phenomena and quantum coherence in solid state systems, quantum microwaves superconductivity and superfluidity, cuprates, pnictides and organic superconductors,
Superconducting Quantum Computing: Multi-qubit operations Quantum Optimal Control Quantum Neural Networks
The primary focus of this project will be on the design, optimal characterization and control of multi-qubit superconducting devices based on transmon qubits in a circuit QED architecture. We will
The primary focus of this project will be on the design, optimal characterization and control of multi-qubit superconducting devices based on transmon qubits in a circuit QED architecture. We will
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)
Dr. Johneph Sukham †
Quantum scientist at the Walther-Meißner-Institute
On July 3 Johneph Sukham died in a tragic accident. He joined the Walther-Meißner-Institute in February 2021 as a quantum
The primary focus of this project will be on the design, optimal characterization and control of multi-qubit superconducting devices based on transmon qubits in a circuit QED architecture.
Artificial neural networks, which simulate the way the human brain analyses and processes information, are used to model complex patterns and prediction problems. This approach typically involves
This project explores the potential of multi-qubit gates for quantum computing on a superconducting qubit platform. The main goal is to develop superconducting architectures and control methods to
The scientific goals of MOQS are to perform experimental and theoretical quantum simulations of comparatively complex molecular structures as well as electron and energy transfer in molecular
Welcome to QMiCS – a European Quantum Flagship project -- QMiCS sets up a quantum microwave local area network cable over a distance of several meters. We will use this architecture to implement
This project seeks to establish a radically new technology platform for experiments in macroscopic quantum physics and for quantum enabled sensing. We exploit magnetic coupling between
Building quantum processor with novel properties based on superconducting qubits - this is the aim of the four year project GeQCoS ('German Quantum Computer based on Superconducting Qubits') funded
The goal of this research project is to explore the potential of multi-qubit gates for quantum computing. The main focus is on speeding up quantum algorithms based on the variational quantum
We study the fundamental physics of solid-state based quantum systems and advance their fabrication technology to lay the basis for applications in quantum computing, quantum communication, and
The field of nano-electromechanics explores the interaction of excitations in an electrical circuit with a displacement of a nano-mechanical object. The resulting sensing concept allows to
In superconducting circuits, the superconducting condensate can be described by a quantum mechanical wave function with a single amplitude and phase. As a consequence, superconducting circuits can be
Accurate control over quantum systems at the level of single and multiple qubits is on top of the obvious requirement of long coherence essential for realizing advanced quantum systems and eventually
We explore possibilities to efficiently create entanglement between multiple qubits by extending the standard gate set.
For the fabrication of nanostructures and quantum circuits including superconducting, spintronic and nanomechanical devices, the WMI operates a class-1000 clean room facility. The clean room is
Modern solid-state research at an international top level is not possible without excellent materials in form of single crystals and thin film heterostructures, state-of-the-art characterization
Improving materials and fabrication concepts is the most essential ingredient for realizing high-quality quantum devices. There can never be enough coherence time.
Microwave signals at the single photon level are used to manipulate and read-out quantum devices at ultra-low temperatures and for quantum communication.
We study the foundations of quantum microwave communication and sensing. We also develop quantum microwave technologies for the realization of quantum local area networks and advanced sensing methods.
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
Microwave quantum networks are expected to play an important role for interlinking different quantum technology platforms operating in the microwave regime. We study the foundations of
We study the foundations of quantum key distribution and cryptography in the microwave domain by exploiting superconducting quantum circuits.
Building and operating a quantum processor based on superconducting qubits to tackle problems that are not solvable by a classical computer is the main objective of this effort. We pursue this goal
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
Dr. Stefan Filipp holds a position as Full Professor (Chair) in Physics at the TU Munich and as Director of the Walther-Meißner-Institute of the Bavarian Academy of Sciences and Humanities since May
Priv.-Doz. Dr. habil. Frank Deppe was a member of the Gross group at WMI as a Master's and Ph.D. student, as well as a Junior Group Leader between 2001 and 2022. Since 2017, he has also been a
Matthias studied physics at the Technical University of Munich (TUM), Germany. He received his diploma in 1995 with an experimental work on Raman spectroscopy in cuprate superconductors at the
Qi-Ming Chen was member of the Gross group as a Ph.D. student between 2018 and 2022.
Ph.D. Thesis: Quantum Statistical Properties of a Superconducting Duffing Oscillator (2022)
Qi-Ming was born and
Leon Koch is currently working as a PhD Student on multi-qubit superconducting qubit platforms. He started his PhD in July 2020. Before he worked in the group of Dieter Kölle and Reinhold Kleiner at
Thomas Luschmann was a member of the Gross group as a Master and Ph.D. Student at WMI between 2017 and 2024.
Master Thesis: Coupling Strings, String Networks and Magnon-Phonon Interaction
Manuel Müller was member of the Gross group at WMI as a Master and Ph.D. Student between 2020 and 2023. Master Thesis: Superconductor/Ferromagnet Heterostructures for Superconducting
Yuki Nojiri was member of the Gross group at WMI as a Ph.D. student between 2019 and 2023. Ph.D. Thesis: Onset of Transmon Ionization in Microwave Single-Photon Detection (2024)
Yuki was working on
Ivan is working as a PhD student on superconducting multi-qubit platforms starting October 2020. Previously he was a Master’s student at the Moscow Institute of Physics and Technology (MIPT). He
Gerhard Huber is currently working as a Master's Student on multi-qubit superconducting qubit gates. Before starting his Master thesis in fall 2020 he studied condensed matter physics at the
