Programm Wintersemester 2022/2023

Mo. 07.11.2022, 16:30 (online)

Nora Lützgendorf (STScI Baltimore)

The James Webb Space Telescope - a record breaker in astronomy


Host:  David DiVincenzo





Mo. 21.11.2022, 16:15 Physik Hörsaal, 28 D 001, hybrid

Gwenhaël de Wasseige (UC Louvain)

Another look on the Universe


Most of what we know about your Universe has been revealed using light. The centuries have brought us a larger variety of instruments to observe the sky in every wavelength. Some of the phenomena happening in our Universe may however not be observable with light. In the past decades, new detection techniques brought us the ability to study the most energetic astrophysical objects with other 'messengers'. This colloquium will review how these messengers could lead us to see the Universe in a bright new way. We will especially focus on telescopes that are working from some of the most extreme locations on Earth, such as the bottom of the sea or the ice of the South Pole, to detect what cannot be detected: neutrinos.


Host:   Philipp Mertsch




Mo. 05.12.2022, 16:15 Physik Hörsaal, 28 D 001

Johannes Erdmann (RWTH Aachen University)

Massive particles in massive data



The top quark and the Higgs boson are the heaviest particles known to date. At the Large Hadron Collider, they are produced abundantly, which allows to measure them with unprecedented precision. These measurements have the potential to uncover new physical phenomena in production and decay mechanisms as well as in rare production processes that are now experimentally accessible. The colloquium will review recent results and outline future directions, focussing on the development of new methods.


Host: Alexander Schmidt





Mo. 19.12.2022, 16:15 Physik Hörsaal, 28 D 001

Dmitri K. Efetov (LMU München)

Plethora of Many-Body Ground States in Magic Angle Twisted Bilayer Graphene



Twist-angle engineering of 2D materials has led to the recent discoveries of novel many-body ground states in moiré systems such as correlated insulators, unconventional superconductivity, strange metals, orbital magnetism and topologically nontrivial phases. These systems are clean and tuneable, where all phases can coexist in a single device, which opens up enormous possibilities to address key questions about the nature of correlation induced superconductivity and topology, and allows to create entirely novel quantum phases with enhanced interactions. In this talk we will introduce some of the main concepts underlying these systems, concentrating on magic angle twisted bilayer graphene (MATBG) and show how symmetry-broken states emerge at all integer electron fillings [1]. We further will discuss recent experiments including screened interactions [2], Chern insulators [3], magnetic Josephson junctions [4], quantum criticality [5], re-entrant correlated insulators at high magnetic fields [6], Dirac spectroscopy of correlated states in magic angle trilayers and discuss some of the avenues for novel quantum sensing applications [8].


Host:  Christoph Stampfer





Mo. 09.01.2023, 16:30 Physik Hörsaal, 28 D 001

Klemens Hammerer (Leibniz Universität Hannover)

Titel: TBD


Host:  Markus Müller




Mo. 23.01.2023, 16:15 Physik Hörsaal, 28 D 001

Karl Jakobs (Universität Freiburg)
Titel: TBD


Host:  Lutz Feld