Today, quantum systems are becoming increasingly important for technological innovations in information processing, cryptography, photonics, spintronics, and high-performance computing. They are in constant interaction with their environment, which influences their modes of operation in many respects. Physicists at the University of Bayreuth, in cooperation with partners at the Universities of Edinburgh and St. Andrews, have now succeeded in developing a novel algorithm to simulate and calculate these influences. In "Nature Physics" they present their discovery, which is ground-breaking for the understanding of open quantum systems.
Researchers in biomedical physics and biology have significantly improved micro-computed tomography, more specifically imaging with phase contrast and high brilliance x-ray radiation. They have developed a new microstructured optical grating and combined it with new analytical algorithms. The new approach makes it possible to depict and analyze the microstructures of samples in greater detail, and to investigate a particularly broad spectrum of samples.
Just as electrons flow through an electrical conductor, magnetic excitations can travel through certain materials. Such excitations, known in physics as "magnons" in analogy to the electron, could transport information much more easily than electrical conductors. An international research team has now made an important discovery on the road to such components, which could be highly energy-efficient and considerably smaller.
Würzburg researchers have highlighted and quantified a three-fold coupling between exciton, photon, and phonon in a microcavity with embedded two-dimensional materials.
Scientists from University of Regensburg, Massachusetts Institute of Technology, Moscow institute of Physics and Technology, and University of Kansas have discovered abnormally strong light absorption in graphene. The effect arises from the conversion of ordinary electromagnetic waves into super-slow surface waves running through graphene. This behavior could serve as the basis for extremely sensitive infrared and terahertz detectors much smaller than existing ones, with similar absorption efficiency. The investigations were carried out in the framework of the Collaborative Research Centre 1277 and published in the prestigious journal Nature Physics.
Toward a new kind of superconductivity: new publication in the Nature Magazine
Prof. Ferenc Krausz has been awarded the prestigious Wolf Prize for Physics. The Hungarian-Austrian physicist receives the prize for his pioneering contributions to ultrafast laser science and attosecond physics. Ferenc Krausz is Chair of Experimental Physics - Laser Physics at Ludwig Maximilians Universität München and Director at the Max Planck Institute of Quantum Optics.
For the first time, a team of researchers at the Technical University of Munich (TUM) has integrated the dark-field X-ray method into a CT scanner suitable for clinical use. Dark-field imaging provides additional information to conventional X-ray imaging. With the new prototype, it is now possible to produce three-dimensional dark-field X-ray images.
Industry and private consumers alike depend on oil and gas pipelines that stretch thousands of kilometers underwater. It is not uncommon for these pipelines to become clogged with deposits. Until now, there have been few means of identifying the formation of plugs in-situ and non-destructively. Measurements at the Research Neutron Source Heinz Maier-Leibnitz (FRM II) at the Technical University of Munich (TUM) now show that neutrons may provide the solution of choice.
Today, high-tech applications in optoelectronics work with ultrafast electrical oscillations, reaching frequencies up to the terahertz range. A team from the Universities of Bayreuth and Melbourne has now succeeded in developing a microscope that records videos of these oscillations. The glow of semiconductor nanocrystals makes visible the previously hidden electric fields that drive ultrafast electrical components. The researchers present their discovery in the journal Light: Science & Applications. The microscope could be used to observe the driving fields of nanocircuits in operation.