Seminars this week

Programm für das Wintersemester 2021/2022

s,  Uhr

06.12.21Moritz Hesping, Institut für Physik
Differential cross section measurement of the pp→WH→WWW process with the ATLAS Experiment
12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum, at Zoom also available

07.12.21Eran Palti, Ben-Gurion University of the Negev
In this talk, I will introduce a particular formulation of the Weak Gravity Conjecture in AdS space in terms of the self-binding energy of a particle. The holographic CFT dual of this formulation corresponds to a certain convex-like structure for operators charged under continuous global symmetries. Motivated by this, we propose a conjecture that this convexity is a general property of all CFTs, not just those with weakly-curved gravitational duals. It is possible to test this in simple CFTs, the conjecture passes all the tests performed so far.
14:00 Uhr s.t., Lorentz room (Staudingerweg 7, 5th floor), at Zoom

07.12.21Edda Gschwendtner, CERN
The construction of ever larger and costlier accelerator facilities has its limits, and new technologies will be needed topush the energy fronTer. Plasma wakefield acceleraTon is a rapidly developing field which appears to be a auspiciouscandidate technology for future high-energy acceleratorsproviding acceleraTon gradients a factor 10 to 1000 larger thanin convenTonal radio-frequency metallic caviTes used in current accelerators.This presentation introduces the plasma wakefield acceleration technology, shows the technological challenges, gives anoverview of the state of the art and shows promising results on the example of the advanced proton driven plasmawakefield experiment, AWAKE, at CERN.
16 Uhr c.t., at Zoom


08.12.21Gisela Schütz, MPI for Intelligent Systems

X-ray magnetization movies: Spin dynamics in reality

15:00 Uhr s.t., at Zoom and SPICE YouTube Channel

08.12.21Andreas Knecht, PSI

Muonic atoms - a precision tool for nuclear, particle and applied physics

13:00 Uhr s.t., at Zoom

08.12.21Benjamin Trefz, Südzucker

IRTG Industry Talk

17:00 Uhr s.t., Galilei room, 01-128, Staudingerweg 9, at Zoom

zukünftige Termine
09.12.21Karen Johnston, University of Strathclyde, Glasgow
Interfaces between different materials are ubiquitous in natural systems and in technological applications. Often, the interface gives rise to interesting phenomena that significantly affects the behaviour of the system. I will present studies of the interfacial behaviour in two types of system: a) polymer composites and b) heterogeneous nucleation. Polymer composites are typically comprised of filler particles, such as carbon fibres, or inorganic nanoparticles, embedded in a polymer matrix. Filler particles are added to alter the polymer properties, for example, to create lightweight and high strength composites that are widely used in the aerospace and automotive industries. The interfaces between the polymer and filler particles, determine the overall properties of the composite material. Simulations can provide molecular level insight into the interfacial structure and properties, which is extremely challenging to measure experimentally. I will show how simulations have provided insight into the properties of polymers at a solid interface [1-3]. Crystal nucleation from solution is known to mainly occur at interfaces (heterogeneous nucleation), although the mechanisms are not well understood. Experiments on glycine aqueous solutions found that oil and PTFE interfaces dramatically accelerates glycine nucleation compared to an air–-solution interface [4,5]. Molecular dynamics simulations found significantly enhanced vs depleted glycine concentrations at the oil-solution vs air-solution interfaces, respectively, which explains the observed nucleation behaviour [5]. [1] K. Johnston and V. Harmandaris, Soft Matter 8, 6320 (2012) [2] K. Johnston and V. Harmandaris, Macromolecules 46, 5741 (2013) [3] D. McKechnie et al. Polymer 195, 122433 (2020) [4] M. J. Vesga et al. Cryst. Eng. Comm. 21 2234 (2019) [5] D. McKechnie et al. J. Phys. Chem. Lett. 11, 2263-2271 (2020)
10:15 Uhr s.t., at Zoom

09.12.21Prof. Gerhard Rempe, Max-Planck-Institut für Quantenoptik; TUM
Quantum networks with long-lived memory devices are a promising platform for modular quantum computing and long-distance quantum communication. Using selected examples, the talk will discuss the state of the art achieved with single emitters in optical resonators for distributed quantum logic and secure quantum repeaters.
14:00 Uhr s.t., at Zoom

09.12.21G. Semeghini, R. Verresen, Harvard University
Zoom coordinates: Meeting-ID: 952 7504 9840 Kenncode: 297559
16:15 Uhr s.t., Zoom, at Zoom