Zeit, Ort:

09:30 Uhr, Otto-Hahn-Hörsaal, Bibliotheksgebäude

Redner:

Prof. Dr. Klaus Blaum, MPIK

Schülerveranstaltung mit Laborführungen (+ Magnetschwebebahn), offen für alle Physik-Interessierte, Anmeldung bitte über Webseite

Zeit, Ort:

11:15 Uhr, Central seminar room, library building

Redner:

Matteo Moretti, MPIK

Titel:

Search for physics beyond the Standard Model with few-electron highly charged ions

Zeit, Ort:

14:00 Uhr, Central seminar room, library building

Redner:

Dr Minh Phan Vo Hong - Sorbonne Université Paris

Titel:

Galactic cosmic-ray transport from small to large scales

The origin of cosmic rays remains one of the greatest mysteries in Modern Astrophysics. Resolving this problem requires more insights into the transport of cosmic rays in the interstellar medium. I will discuss some progress on modelling cosmic-ray propagation from small scales, e.g. with star-forming regions or around candidate sources, to large Galactic scales. Certain probes to better constrain transport properties of cosmic rays like ionization rates, gamma-ray emissions, or local cosmic-ray spectra and anisotropies will also be discussed. The collective constraints from these probes will not only allow for improved understanding on the transport cosmic rays but might ultimately allow us to extract information about the Galactic distribution of cosmic-ray sources.

Zeit, Ort:

09:30 Uhr, Central Seminar Room, library building

Redner:

Lakshmi Kozhiparambil, Highly charged ion dynamics

Titel:

Towards optical spectroscopy of highly charged californium ions

Zeit, Ort:

15:00 Uhr, Hybrid seminar: central seminar room, library building + Zoom: Meeting-ID: 915 1204 2752 Passcode: 758933

Redner:

Dr. Timo Dickel, GSI Darmstadt

Titel:

New ion trapping and mass spectrometry methods for improved sensitivity and novel applications

Zeit, Ort:

11:15 Uhr, Central seminar room, library building

Redner:

Maya Hager

Titel:

Phasing out of Darkness: From Sterile Neutrino Dark Matter to Neutrino Masses via Time-Dependent Mixing

Zeit, Ort:

16:00 Uhr, ITP Heidelberg University; Teilchentee, Room 106 Philosophenweg 12

Redner:

Dr. Jeffrey Kuntz (MPIK)

Titel:

Unitarity in Pseudo-Hermitian​ Quadratic Gravity

Joint Seminar with ITP Heidelberg, TeilchenteeTheories described by non-Hermitian Hamiltonians are known to possess strictly positive energy eigenvalues and exhibit unitary time evolution if their Hamiltonian possesses an anti-linear symmetry or, equivalently, is pseudo-Hermitian. We review these claims and demonstrate how quantum quadratic gravity, a theory that generally violates unitarity when viewed as a Hermitian QFT, can be complex-deformed into an anti-linear PT-symmetric theory with an action that consists of a ghost-less Hermitian free part and non-Hermitian interactions. We also show compelling evidence that the quantized theory possesses a unitary inner product and a sensible interpretation of quantum probability, thus avoiding the ghost problem present in the Hermitian formulation of quadratic gravity.