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Semináře

Úterý, 16.10.2018 14:00

Lasha Berezhiani (Max Planc Institute of Physics (Munich, Germany))

After a brief review of some of the empirical correlations between dark and baryonic sectors within galaxies, I will discuss a novel theory of dark matter superfluidity as a potential explanation of these observations. I will argue that, depending on the mass and self-interaction cross section of dark matter particles, the superfluid may in principle be formed in the central regions of galactic halos. After this, I will discuss the criteria that need to be met by superfluid properties in order to account for the above-mentioned empirical correlations.

Úterý, 23.10.2018 10:00

Thomas A. Jung (Paul Scherrer Institute, Switzerland; University of Basel, Switzerland)

Future quantum technologies, for...

Úterý, 30.10.2018 10:00

Mariana Hildebrand (Imperial College London; mariana [dot] hildebrand13atimperial [dot] ac [dot] uk)

Recent interest in functionalised graphene has been motivated by the prospect of creating a two-dimensional semiconductor with a tunable band gap. Various approaches to band gap engineering have been made over the last decade, one of which is chemical functionalisation. In this work, a predictive physical model of the self-assembly of halogenated carbene layers on graphene is suggested. Self-assembly of the adsorbed layer is found to be governed by a combination of the curvature of the graphene sheet, local distortions, as introduced by molecular adsorption, and short-range intermolecular...

Čtvrtek, 15.11.2018 15:00

Peter Saalfrank (Institut für Chemie, Universität Potsdam, Potsdam, Germany)

The coupling of electrons of a (metal) surface to an adsorbate, or non-adiabatic effects in general, are often neglected in previous theoretical treatments of molecular dynamics of atoms or molecules adsorbed at surfaces. However, they can have a decisive influence on various phenomena, such the vibrational relaxation of the adsorbed species, inelastic molecule-surface scattering, and femtosecond-laser induced surface photochemistry. Fully quantum, multi-dimensional dynamical approaches are unfeasible in most cases and / or rely on far-going model assumptions. Recent years have seen the...