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The WMI educates young people in condensed matter and quantum physics, plans and coordinates research projects. performs experiments at low and ultra-low temperatures, publishes various research…
TYPO3 - Fortgeschrittene Funktionen in der Datenbank (4:30 min.)
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…
Team members
Max Werninghaus (PhD student working at IBM Research – Zurich) Federico Roy (PhD student working IBM Research – Zurich)
Collaborators
Daniel Egger (IBM Research – Zurich) Shai…
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…
Superconducting circuits incorporating Josephson elements represent a promising hardware platform for quantum technologies. Potential applications include scalable quantum computing, microwave…
As quantum information technologies advance they face challenges in scaling and connectivity. In particular, two necessities remain independent of the technological implementation: the need for…
Rare-earth spin ensembles are a promising platform for microwave quantum memory applications due to their hyperfine transitions, which can exhibit exceptionally long coherence times when using an…
We investigate the growth of amorphous MoSi thin films using magnetron co-sputtering and optimize the growth conditions with respect to crystal structure and superconducting properties (e.g.,…
The mechanical properties of thin films can vary significantly due to variations in the deposition process. Monitoring these properties is essential when, e.g., engineering micro-mechanical devices.…
The resistance of a heavy metal can be modulated by an adjacent magnetic material through the combined effects of the spin Hall effect, inverse spin Hall effect, and dissipation of the spin…
Altermagnetism has surfaced as a novel magnetic phase, bridging the properties of ferro- and anti-ferromagnetism. The momentum-dependent spin-splitting observed in these materials reflects their…
Quantum state tomography of weak microwave signals is an important part of many protocols in the field of quantum information processing with superconducting circuits. This step typically relies on…
Scalable quantum information processing with superconducting circuits is expected to advance from individual processors located in single dilution refrigerators to more powerful distributed quantum…
Dissipative transport of both fermionic and bosonic particles belongs to the Kardar–Parisi–Zhang universality class.
The optical manipulation of magnon states in antiferromagnets (AFMs) holds significant potential for advancing AFM-based computing devices. In particular, two-magnon Raman scattering processes are…
WMI researchers realized an improved version of Planck spectroscopy, allowing them to resolve changes in microwave losses of less than 0.1 dB.
In its cabinet meeting on 11/02/2025, the Bavarian State Government decided to strengthen MQV as one of the key projects of its Hightech Agenda.
We implemented Perfect State Transfer and demonstrated its usefulness in efficiently connecting distant qubits and generating multi-qubit entanglement
Rudolf Gross retires as Scientific Director of the WMI after shaping the institute for 25 years.
The German Science foundation (DFG) funds the research unit ‘Chiral phonons for spintronics (CHIPS)‘.
The Alexander von Humboldt Foundation awards Prof. Dr. Rudolf Gross the Werner Heisenberg Medal.
This study delves into spin current-induced phenomena, such as spin-Hall magnetoresistance and the spin Seebeck effect within Pt films deposited on a noncollinear magnet, CoCr 2O 4 (CCO),…
We develop a theoretical model for polarization-selective phonon pumping induced by magnon-phonon coupling in a ferromagnetic/non-magnetic acoustic bilayer structure, focusing on the effects arising…
The Schoolkindergarten "Weltentdecker" from Neufahrn b. Freising visited the Walther-Meißner-Institut.
WMI succeeds in fabricating Josephson junction-based parametric devices with exceptionally high quality factors
WMI develops a cryogenic link for Quantum Local Area Networks (QLAN), serving as a backbone for distributed superconducting quantum computing
The distribution of remote entanglement within small- and large-scale quantum networks is becoming a fundamental task as quantum computing and quantum communication mature into more advanced fields.…
We optimize Matrix-Product State (MPS)-based algorithms for simulating quantum circuits with finite fidelity, specifically the Time-Evolving Block Decimation (TEBD) and the Density-Matrix…
We study a generic cavity QED setup under conditions where the coupling between the two-level systems and a single bosonic mode is significantly degraded by low-frequency noise. To overcome this…
We study the collective decay of an initially inverted ensemble of two-level emitters into a squeezed photonic reservoir. By using a quantum-state diffusion approach to unravel the emission process,…
We study the directed transport of bosons along a one dimensional lattice in a dissipative setting, where the hopping is only facilitated by coupling to a Markovian reservoir. By combining numerical…
We extend the controlled displacement interaction between a qubit and a harmonic oscillator to the multiqubit (qudit) case. We define discrete quadratures of the qudit and show how the qudit state…
Our former Bachelor and Master student Johanna Fischer (now at Spintec Grenoble, France) receives the 2025 EMA Young Scientist Award.
Researchers have demonstrated the direction-dependent slowdown of
microwave pulses, with potential applications in signal processing and
quantum computing. | Hans Huebl and Matthias Althammer
WMI to receive funding within the Cluster of Excellence MCQST for seven more years through 2032
We discuss the topic of quantum illumination, which is related to quantum radar technology and aims to outperform the optimal classical radar. The scheme we consider relies on quantum entangled…
WMI co-organizes the workshop on Rare-Earth Ions for Quantum Information 2024, taking place in Munich from 17 to 20 September 2024.
WMI researchers demonstrate microwave single-shot quantum key distribution, allowing for unconditional security in µw-based communication.
The layered molecular conductors κ-(BEDT-TTF)2X are a perfect experimental platform for studying the physics of the Mott transition and related exotic electronic states. In these materials, the…
"Quantum” may not be the first word that comes to mind when thinking about chemistry. But at the atomic level, the physical and chemical properties of molecules can be affected by quantum mechanical…
WMI demonstrates a highly protected superconducting qubit as building block of a scalable quantum processor with strongly suppressed qubit coherence.
Planar scanning probe microscopy is a recently emerging alternative approach to tip-based scanning probe imaging. It can scan an extended planar sensor, such as a polished bulk diamond doped with…
To control and measure the state of a quantum system, it must necessarily be coupled to external degrees of freedom. This inevitably leads to spontaneous emission via the Purcell effect,…
WMI reviews the potential of its quantum computing technology for near-term simulations of quantum chemistry.
We investigate the onset of transmon ionization (TI) in an irreversible, parametrically-driven, frequency conversion process in a 3D-cavity combined with a transmon qubit. We infer that a sudden…
