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
Quantum communication exploits non-classical correlations to achieve efficient and unconditionally secure exchange of information. In particular, the quantum teleportation protocol allows for a…
Scaling up superconducting quantum processors requires a high routing density for readout and control lines, relying on low-loss interconnects to maintain design flexibility and device performance.…
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.
The research unit ‘Chiral phonons for spintronics (CHIPS)‘ wants to understand the physical properties of these chiral phonons in connection with magnetism and spintronics, i.e. in connection with…
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.
KRYOWAVE funded by the BMFTR aims to develop an optically mediated, scalable control platform for superconducting qubits, targeting improved signal quality and gate fidelities, while reducing wiring…
Highly sensitive optical quantum detectors—known as superconducting nanowire single-photon detectors (SNSPDs)—constitute an important key component for the efficient processing and transmission of…
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
Spin-based information processing is a viable alternative to charge-based approaches, enabling low-power devices. In magnetically ordered systems, spin information can be transported via the…
The Junior Research Group will advance quantum processor calibration and stabilization using machine learning and quantum sensing.
The European consortium OpenSuperQPlus (OSQ+) is making significant strides toward building Europe’s first 100-qubit quantum computer by 2026.
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…
Universal quantum computers promise to solve computational problems that are beyond the capabilities of known classical algorithms. To realize such quantum hardware on a superconducting material…
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…
Rudolf Gross has been appointed TUM Emeritus of Excellence and becomes a member of the TUM Senior Excellence Faculty (SEF).
The analytical study of confinement in lattice gauge theories (LGTs) remains a difficult task to this day. Taking a geometric perspective on confinement, we develop a real-space renormalization group…
Our former Bachelor and Master student Johanna Fischer (now at Spintec Grenoble, France) receives the 2025 EMA Young Scientist Award.
| Walther-Meißner-Institut
The efficient transfer of quantum states into a long-lived storage unit such as solid-state spin ensembles is widely recognized as a critical challenge with significant implications for quantum…
We study the collective emission of a disordered array of N excited two-level atoms into a one-dimensional photonic waveguide. In the perfectly ordered case, where atoms are spaced by exact integer…
We discuss a conceptually simple scheme for cooling a one dimensional gas of microwave photons in a superconducting transmission line. By shunting one end of the transmission line by a nonlinear…
One main limiting factor towards achieving high coherence times in superconducting circuits is two level system (TLS) losses. Mitigating such losses requires controlling the formation of native…
Researchers have demonstrated the direction-dependent slowdown of
microwave pulses, with potential applications in signal processing and
quantum computing. | Hans Huebl and Matthias Althammer
Interfacial thermal and acoustic phenomena have an important role in quantum science and technology, including in spintronic and spincaloritronic materials and devices. Simultaneous measurements of…
Matthias Opel was invited to the MINT-Berufsinformationstag "OsterHASE" at the Humboldt-Gymnasium Vaterstetten, Germany.
The 2025 Nobel Prize in Physics goes to three physicists from Berkeley for their research on quantum phenomena in superconducting Josephson junctions
WMI opened its doors to the general public in the context of the 2025 International Year of Quantum Science and Technology (IYQ)
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…
In a phononic quantum network, quantum information is stored and processed within stationary nodes defined by solid-state spins, and the information is routed between nodes by phonons. The phonon…
The superradiant phase transition in the dissipative Dicke lattice model, driven by on-site collective atom-photon interactions and inter-site photon hopping, is a cornerstone of nonequilibrium…
Diblock copolymer thin films templating two types of magnetic nanoparticles are ternary nanocomposites that can show tunable magnetic behavior depending on the size and magnetic properties of the…
Understanding the excitations of quantum materials is essential for unraveling how their microscopic constituents interact. Among these, particle-hole excitations form a particularly important class,…
We analyze the recently observed breakdown of the integer quantum Hall effect in a two-dimensional electron gas embedded in a metallic split-ring resonator. By accounting for both the quantized…
Spin-orbit-torque-driven auto-oscillations in spin Hall nano-oscillators (SHNOs) offer a transformative pathway toward energy-efficient, nanoscale microwave devices for next-generation neuromorphic…
Hybrid platforms that couple microwave photons to collective spin excitations offer promising routes for coherent information processing, yet conventional magnets face inherent trade-offs among…
State-of-the-art single-qubit gates on superconducting transmon qubits can achieve the fidelities required for error-corrected computations. However, parameter fluctuations due to qubit…
Nonreciprocity-the ability to transmit signals in one direction while blocking them in the reverse-has become a powerful resource in quantum technologies, enabling directional amplification, routing…
