Wochenübersicht für die Woche 07 Jul 2025 bis 13 Jul 2025 (KW 28)

08 Jul 2025

Physikalisches Kolloquium

Institut für Physik

16:15 Uhr s.t., HS KPH

Volker Springel, Max Planck-Institut für Astrophysik, Garching
Numerical calculations of cosmic structure formation have become a powerful tool in astrophysics. Starting right after the Big Bang, they are not only able to accurately predict the dark matter backbone of the cosmic web far into the non-linear regime, but are also capable of following baryonic physics with rapidly improving fidelity. In my talk, I will review the methodology and selected results of recent structure formation simulations that follow large parts of the observable universe. I will discuss some of the primary challenges in modelling strong, scale-dependent feedback processes that regulate star formation in galaxies, and highlight the important role played by supermassive black holes in galaxy formation. I will also discuss extremely large simulations and describe how they help to make reliable predictions for the impact of baryons and massive neutrinos on cosmological observables, effects that need to be understood to make full use of upcoming new survey data. The simulation results also shed light on cosmic reionization and magnetic field amplification during non-linear structure formation. Finally, I will highlight some of the methodological and technical challenges involved in obtaining future multi-physics, multi-scale simulations that aim for more accurate predictions.

Theorie-Palaver

Institut für Physik

Sonderseminar: 14:00 Uhr s.t., Lorentz room (Staudingerweg 7, 5th floor)

Antonio Iovino, New York U., Abu Dhabi
The existence of primordial black holes can be probed through the gravitational waves generated during their formation and subsequent evolution. In this talk, we will explore different frequency ranges and the corresponding experiments designed to test their existence. We will cover the spectrum from ultra-low-frequency gravitational waves—targeted by future missions such as LiteBIRD—to current experiments using pulsar timing arrays and the LIGO-Virgo-KAGRA network, as well as upcoming efforts in the ultra-high-frequency domain.

Sonderseminar

09 Jul 2025

PRISMA+ Colloquium

Institut für Physik

13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7

Carlos Tamarit Degenhardt, THEP, JGU Mainz
The early universe likely underwent a series of phase transitions as it expanded and cooled from an initially hot, dense state. Among these, first-order phase transitions --proceeding through the nucleation and expansion of bubbles-- are particularly interesting due to their potential cosmological implications, which include gravitational wave production and the possibility to generate the baryon asymmetry through the mechanism of electroweak baryogenesis. In this talk I will review the theoretical framework used to study such transitions and discuss recent progress on understanding bubble velocities and CP-violating effects relevant for electroweak baryogenesis.
Slides here...

10 Jul 2025

Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)

Institut für Physik

14:15 Uhr s.t., IPH Lorentzraum 05-127

Prof. Dr. Friedemann Reinhard, Universität Rostock
Diamond quantum sensors for magnetic fields have transformed several areas of science, most prominently magnetic resonance and magnetic field imaging at the micro- and nanoscale. However, these breakthroughs have largely remained limited to specialized laboratories. I will present two lines of research of our laboratory to change this state of affairs and significantly simplify the use of diamond quantum sensors. One direction concerns scanning probe imaging, where we have developed a simplified approach to scanning probe positioning. While conventional setups image magnetic fields by scanning a nanofabricated diamond tip hosting a single NV center across a sample, we developed a setup where we can scan an extended (10 µm to mm) bulk diamond in 10 nm-scale proximity of a sample, using interferometric alignment to maintain the sensor perfectly parallel to the sample. Beyond a technical simplification, this approach opens the door to massively parallel scanning probe microscopy using multiple NV centers, as well as to novel plasmonic near-field microscopes. Another direction concerns the electric readout of large ensembles of NV center spins, as they might find application in large-scale commercial devices like gyroscopes or magnetic field sensors. Here, we have shown in recent research that readout in a microwave cavity is remarkably competitive with more established optical readout for large ensembles, and provides a straightforward all-electric way to integrate diamond spin sensors into microfabricated circuits.

Zum Physikalischen Kolloquium Mainz


Liste der laufenden Seminare und Kolloquien

Veranstaltungstitel Termin und Ort Koordinator
Institutsseminar Kern- und Hadronenphysik Montags, 1415 Uhr, HS Kernphysik, Becherweg 45 Prof. Dr. Michael Ostrick
Seminar Festkörper- und Grenzflächenphysik Dienstags, 1200 Uhr, Newton-Raum, Staudingerweg 9, 1. Stock, Raum 122 (Nebengebaeude) Prof. Dr. Hans-Joachim Elmers
Seminar über Theorie der Kondensierten Materie/
Weiche Materie und Statistische Physik
Freitags, 1030 Uhr, Newton-Raum (LG 01-122) F. Schmid
P. Virnau
L. Stelzl
Theory of Condensed Matter: Hard Condensed Matter Tuesday, 1000 Uhr, Seminarraum K Prof. Dr. Jairo Sinova
Theorie Palaver Dienstags, 1430 Uhr, Lorentz-Raum (05-127) Upalaparna Banerjee
Federico Gasparotto
Pouria Mazloumi
Yong Xu
Physikalisches Kolloquium Mainz Dienstags, 1615 Uhr, HS Kernphysik, Becherweg 45 Prof. Dr. Friederike Schmid
Prof. Dr. Concettina Sfienti
PRISMA Colloquium Mittwochs, 1300 Uhr, Lorentz-Raum (05-127) Prof. Dr. Tobias Hurth
Quantengravitation-Seminar Donnerstags, Sozialraum der THEP; Institut fuer Physik (05-427). Prof. Dr. M. Reuter
Theoriekolloquium Donnerstags, 1600 Uhr, Newton-Raum (LG 01-122). Prof. Dr. P.G.J. van Dongen
Jun.-Prof. Dr. J. Marino
QUANTUM-Seminar Donnerstags, 1415, Lorentz-Raum (05-127) Prof. Dr. Peter van Loock
Dr. Lars von der Wense
Seminar experimentelle Physik der kondensierten Materie Donnerstags, 1400, Minkowski-Raum, 05-119, Staudingerweg 7 Univ-Prof. Dr. Jure Demsar
Univ.-Prof. Dr. Hans-Joachim Elmers
Univ.-Prof. Dr. Mathias Kläui
Univ.-Prof. Dr. Thomas Palberg
Seminar zu Themen in der Collider-Physik Freitags, 1230, Sozialraum ThEP (05-427) Riccardo Bartocci
Prisco Lo Chiatto
Nicklas Ramberg
Miroslava Mosso Rojas
MAINZ lecture series Mittwochs, 915, Staudingerweg 9, 3. Stock, Raum 122 Dr. M. Weides
Excellence@WORK XXXXX,XXXX Katrin Klauer
Seminar about Experimental Particle and Astroparticle Physics (ETAP) Montags, 1215, Staudingerweg 7, 5. Stock, Minkowski-Raum 119 Dr. DB. Ta

Weitere Veranstaltungen

Quantum Sonderseminar Seminarraum Quantum (02-427) Prof. Dr. Ferdinand Schmidt-Kaler

 

Beteiligte Einrichtungen: Institut für Physik,
Institut für Kernphysik,
Institut für Physik der Atmosphäre
Max-Planck-Institut für Polymerforschung, Max-Planck-Institut für Chemie
Technische Wartung: ducbao.ta (klammeraffe) uni-mainz.de