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…
Manifesting across all time, mass and length scales, nonlinearities lie at the core of numerous physical phenomena. Next-generation quantum applications, such as quantum sensing, require the…
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…
Quantum communication in the microwave regime is set to play an important role in distributed quantum computing and hybrid quantum networks. However, typical superconducting quantum circuits require…
WMI to receive funding within the Cluster of Excellence MCQST for seven more years through 2032
Magnetic tunnel junctions (MTJs) offer a promising pathway toward energy-efficient neuromorphic computing due to their nanoscale footprint, nonvolatile switching, and intrinsic nonlinear dynamics…
Nitrogen-vacancy (NV) centers in diamond are optically addressable spin defects with great potential for nanoscale quantum sensing. A key application of NV centers is the detection of external spins…
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…
Matthias Althammer was awarded a prestigious Consolidator Grant from the ERC with total funding of about 2 Mio. euros for 5 years.
Ternary hybrid thin films composed of a diblock copolymer templating two types of nanoparticles (NPs) expand the functionality of binary systems, which renders them interesting for magnetic sensing…
Dr. Hans Hübl has been appointed Adjunct Professor at TUM in recognition for many years of excellence in research and teaching.
The second place at the MCQST best poster award goes to Emily Wright from the Quantum Computing team at the WMI.
Joint development of superconducting quantum processors and quantum circuits within the Munich Quantum Valley initiated
Multi-mode superconducting circuits offer a promising platform for engineering robust systems for quantum computation. Previous studies have shown that single-mode devices cannot simultaneously…
| Walther-Meißner-Institut
| G. Angloher, A. Erb et al., CRESST Collaboration
In recent times, the sensitivity of low-mass direct dark matter searches has been limited by unknown low energy backgrounds close to the energy threshold of the experiments known as the low energy…
Recently low-mass dark matter direct searches have been hindered by a low-energy background, drastically reducing the physics reach of the experiments. In the CRESST-III experiment, this signal is…
Diamond operated as a cryogenic calorimeter is an excellent target for direct detection of low-mass dark matter candidates. Following the realization of the first low-threshold cryogenic detector…
Magnomechanical devices, in which magnetic excitations couple to mechanical vibrations, have been discussed as efficient and broadband microwave signal transducers in the classical and quantum limit.…
In quantum illumination, various detection schemes have been proposed for harnessing remaining quantum correlations of the entanglement-based resource state. To this date, the only successful…
We study Y3Fe5O12 (YIG) nanoflakes that we produce via mechanical cleaving and exfoliation of YIG single crystals. By characterizing their structural and magnetic properties, we find that these YIG…
Converting angular momentum between different degrees of freedom within a magnetic material results from a dynamic interplay between electrons, magnons, and phonons. This interplay is pivotal to…
Security of modern classical data encryption often relies on computationally hard problems, which can be trivialized with the advent of quantum computers. A potential remedy for this is quantum…
Ferroelectricity, where electronic degrees of freedom determine the polar order—thereby enabling fast switching and phase control—is an important research field in current condensed-matter physics.…
Tailored magnon-phonon hybrid systems, in which high-overtone bulk acoustic resonators couple resonantly to the Kittel mode of a ferromagnetic thin film, are considered optimal for the creation of…
In the present work, a detailed field dependence of the resistivity of Ni75Co25 and Ni40Co60 bulk alloys was measured at T = 3 K and 300 K up to high magnetic fields. The focus of the study was to…
We present a cavity-electromechanical system comprising a superconducting quantum interference device which is embedded in a microwave resonator and coupled via a pickup loop to a 6-μg magnetically…
We study the incoherent transport of bosonic particles through a one dimensional lattice with different left and right hopping rates, as modelled by the asymmetric simple inclusion process (ASIP).…
A Cu/Ti neutron supermirror was developed and optimized for high overall and low spin-dependent neutron reflectivities. Control of the roughness growth allowed to achieve 90% reflectivity at the…
We analyze the implementation of high-fidelity, phonon-mediated gate operations and quantum simulation schemes for spin qubits associated with silicon vacancy centers in diamond. Specifically, we…
WMI researchers demonstrate the interconversion of magnons and chiral phonons using a versatile experimental platform
In November 2023, the SNSF Sinergia grant An acoustic quantum interface for circuits and spins (AcQuaInt) was funded by the Swiss National Science Foundation (SNSF). This four year long research…
