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,
Nonequilibrium phase transitions and transport in driven-dissipative systems
While the theory of phase transitions in ground and equilibrium states of condensed matter systems is well established,
| Christ, P; Biberacher, W; Jansen, AGM; Kartsovnik, MV; Kovalev, AE; Kushch, ND; Steep, E; Andres, K
Nitin Chelwani was member of the Gross group at WMI as a Ph.D. student between June 2011 and December 2016.
Ph.D. Thesis: Scanning Microscopy and Momentum-Resolved Raman Scattering in Semiconductors
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
Antiferromagnetic materials promise improved performance for spintronic applications as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics
We describe the results of electronic Raman-scattering experiments in differently doped single crystals of YBCO and BiSCCO. The data in antiferromagnetic insulating samples suggest that at least the
We have optimized the growth of superconducting TaN thin films on SiO2 substrates via dc magnetron sputtering and extract a maximum superconducting transition temperature of Tc = 5 K as well as a
The spin Hall effect in heavy-metal thin films is routinely used to convert charge currents into transverse spin currents and can be used to exert torque on adjacent ferromagnets. Conversely, the
The coupling between electrical, thermal, and spin transport results in a plethora of novel transport phenomena. However, disentangling different effects is experimentally very challenging. We
Polarization- and temperature-dependent Raman data along with theoretical simulations are presented for the Kagome ferromagnet Fe3Sn2. Eight out of nine expected phonon modes are identified. The
Protecting qubits from environmental noise while maintaining strong coupling for fast high-fidelity control is a central challenge for quantum information processing. Here, we demonstrate a novel
Achieving fast and high-fidelity qubit operations is crucial for unlocking the potential of quantum computers. In particular, reaching low gate errors in two-qubit gates has been a long-standing
In easy-plane antiferromagnets, the nature of the elementary excitations of the spin system is captured by the precession of the magnon pseudospin around its equilibrium pseudofield, manifesting
Antiferromagnetic materials promise improved performance for spintronic applications, as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics
We extend the off-diagonal geometric phase [Phys. Rev. Lett. 85, 3067 (2000)] to mixed quantal states. The nodal structure of this phase in the qubit (two-level) case is compared with that of the
Jan Boris Philipp was member of the Gross group at WMI as a Ph.D. student between 2000 and 2003. Ph.D. Thesis: Spinabhängiger Transport in Übergangsmetalloxiden (2003)
In his Ph.D.
In order to characterize and calibrate quantum processing devices, a large amount of measurement data has to be collected. Active qubit reset increases the speed at which data can be gathered but
The development of magnetic hybrid films containing diblock copolymers (DBCs) and magnetic nanoparticles (NPs) by printing is a highly promising method for scalable and low-cost fabrication. During
Pure spin currents represent the charge-less transport of angular momentum. Our present research is focused on the injection, transport, and detection of magnon-based angular momentum transport in
CRESST is one of the most prominent direct detection experiments for dark matter particles with sub-GeV/c2 mass. One of the advantages of the CRESST experiment is the possibility to include a large
Edwar Xie was member of the Gross group as a Master and Ph.D. Student between 2012 and 2019.
Master Thesis: Epitaxie und Charakterisierung von dünnen Schichten des ferromagnetischen
Christoph Zollitsch was member of the Gross group at WMI as a Master and Ph.D. Student between 2011 and 2015.
Master Thesis: Ferromagnetic Resonance at Low Temperatures (2011) Ph.D. Thesis: Single
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
Waveguide QED and light-matter-interactions in low dimensions
Compared to free space, the interaction between light and matter can become considerably more involved when atoms or other emitters are
We present limits on the spin-independent interaction cross section of dark matter particles with silicon nuclei, derived from data taken with a cryogenic calorimeter with 0.35 g target mass operated
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.
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
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
