Physikalische Kolloquien im Sommersemester 2026

Termine im Sommersemester 2026

• 15. Juni 2026

  

  Gastgeber Prof. Heidemarie Krüger, Leibniz-IPHT

  Primordial magnetic fields and relic gravitational waves messengers of the first microseconds
  (Habilitationsvorstellungsvortrag)

  Dr. Sarmiza Stanca

  The work aims to develop a trimodal atomic force microscopy (AFM) probe sensor, which synergistically combines the nanoscale topography recordings with nanoscale tip-electrochemistry recordings, to obtain nanoscale electro-structural information, and with photoinduced force microscopy (PiFM) recordings, to obtain vibrational modes of the molecules. The set-up conducted under the illumination of two lasers beams, complementarily combines tree sensitive techniques: I. Atomic force microscopy for morphological information at nanoscale, II. Photoinduced force microscopy for molecular vibrational information at nanoscale, and III. Tip electrochemistry for electrochemical information at nanoscale. This work benefits from photoinduced force microscopy, which offers great potential for investigating quantum phenomena at the nanoscale between tip and membrane.

  Mehr erfahren
• 27. April 2025

  

  Gastgeber Prof. Dr. Giancarlo Soavi, NOA

  Nanophotonic simulations using the boundary element method

  Prof. Dr. Ulrich Hohenester, Universität Graz

  Computational Maxwell solvers based on the boundary element method (BEM) enable fast and accurate simulations of sufficiently small scatterers. Over the last few years, we have developed our own BEM Maxwell solver termed nanobem, and have implemented the computation of T-matrices for scatterers with arbitrary geometries [1].  

  The combination of BEM and T-matrices has allowed us to develop two add-ons to the nanobem toolbox dealing with optical tweezers and optical interference microscopies, which have been used for life science applications. In this talk I will first present our simulation approach for optofluidic force induction, a novel nanoparticle characterization scheme based on optical and fluidic forces [2]. I will then discuss interference scattering microscopy (iSCAT), allowing for label-free localization of proteins and other nanoparticles, and how the localization precision can be improved using the concept of (quantum) Fisher information [3,4].  
   
  References
  [1]    N. Asadova et al., JQSRT 333, 109310 (2025).
  [2]    M. Šimić et al., Nano Letters 25, 8805 (2025).
  [3]    F. Hitzelhammer et al., ACS Photonics 11, 2745 (2024).
  [4]    U. Hohenester et al., Nanophotonics 14, 4351 (2025).

  Mehr erfahren
• 4. Mai 2026

  Gastgeber Prof. Dr. Holger Gies, Ernst-Abbe-Kolloquium

  Title

  Prof. Dr. Jens Eisert, Freie Universität Berlin

  abstract

• 22. Juni 2026

  

  Gastgeber Prof. Dr. Martin Ammon, Dr. Federico Capone

  The black hole information paradox

  Prof. Dr. Marika Taylor, University of Birmingham

  Fifty years ago, Stephen Hawking showed that black holes emit radiation due to quantum effects. The discovery of Hawking radiation has led to a longstanding puzzle about the nature of black holes. This is the information paradox, the question of what happens to information that falls into a black hole. In this colloquium we will explain the information paradox, and discuss why it is so important for understanding the quantum nature of gravity. We will explore contemporary ideas for resolving the paradox, and how these may relate to quantum computing.

  Mehr erfahren
• 29. Juni 2026

  

  Gastgeber PAK Teams

  Present and future of experimental low-energy precision nuclear physics

  Prof. Dr. Klaus Blaum, Max-Planck-Institut für Kernphysik

  The four fundamental interactions and their underlying symmetries, together with the fundamental constants and intrinsic properties of elementary particles, such as nuclear masses and magnetic moments, constitute the structural foundation of the universe and underpin the well-established Standard Model of particle physics.

  This overview presents recent nuclear-physics tests of these interactions and symmetries through high-precision measurements of atomic and nuclear masses, nuclear charge radii, and magnetic moments. These experiments are performed on single or few cooled exotic ions, either probed by laser spectroscopy or confined in Penning traps.

  Notably, such measurements have, among other achievements, enabled stringent constraints to be placed on a hypothetical fifth force in the keV/c² to MeV/c² mass range coupling to electrons and neutrons, and have significantly improved the precision of several key fundamental constants.

  Mehr erfahren
• 6. Juli 2026

  Gastgeber Prof. Dr. Giancarlo Soavi

  Title

  Prof. Dr. Claudia Felser, Max-Planck-Institut für Chemische Physik fester Stoffe

  abstract