Quantum Technologies Collaboration - Research Projects
X-rays offer the unique combination of high penetration and short wavelength which makes them ideal for non-destructive imaging. Highest imaging resolution is achieved bypassing the difficulties of manufacturing X-ray lenses and instead using lens-less imaging techniques. We use a variant of such techniques, called ‘Ptychography’, which combines scanning microscopy and coherent diffractive imaging. 3D microscopy is possible by acquiring many projections at different sample orientations, and thus non-destructive inspection and analysis becomes possible. In contrast, established techniques via electron microscopy require slice and view approaches, meaning the specimen is destroyed during the imaging process.
We study the phenomenology and the microscopic theory of non-linearly driven, many-body localised quantum magnets. We analyze the linear response far-off-equilibrium as a means to probe and characterize many-body localization.
Hyper Quantum Criticality
Hyper Quantum Criticality – HyperQC is a major initiative with the aim of generating and controlling novel phases of correlated magnetic quantum matter, and of exploring them in high-precision experiments. A combination of new capabilities enabled by the development of instrumentation, pioneering ultra-fast studies and experiments on magnetic model materials will allow both the exploration of fundamental Hamiltonians and fully quantitative tests of quantum criticality in hyper-parameter space: temperature, magnetic field, pressure, energy, momentum and time.
The possibilities to use topological protected boundary states and bulk excitations in quantum many-body physics as a platform for quantum information and spintronics will be investigated.
We use soft-X-ray photoelectron spectroscopy at the Swiss Light Source to explore electronic structure of buried interface and impurity systems (oxide, semiconductor and topological interfaces, proximity effects, magnetic impurities, etc.) which are in the core of nowadays and future quantum electronics.