Seminar Dynamik und Struktur von Atomen und Molekülen
Vera Schäfer, Laura Cattaneo, Gergana Borisova and Alexander Magunia
How to give a talk?
Zentraler Seminarraum / Central seminar room (library)
15:00
Seminar Stored and Cooled Ions
Maria Pasinetti, MPIK
Towards trapping antimatter: the evolving status of LSym
Hybrid seminar: central seminar room, library building + Zoom: Meeting-ID: 915 1204 2752 Passcode: 758933
17:00
SFB1225 ISOQUANT
Dr. Mariana Alarcon Correa
Meet&Mingle@ISOQUANT: Networking and Mentoring platform for FLINTA* students in physics
Institut für Theoretische Physik, PI, Goldene Box
tba
Friday, 2 May 2025
17:00
Physikalisches Kolloquium
Prof. Dr. Astrid Eichhorn
Probing quantum gravity at all scales
KIP, INF 227, Hörsaal 1
What is the fundamental quantum structure of spacetime? This question constitutes a persistent challenge in physics and several candidate theories of quantum gravity have been developed in response to this challenge. However, experimental tests of these theories are extremely rare, because the typical scale of quantum gravity, the Planck scale, is much smaller than distance scales that can be probed experimentally.
To confront quantum theories of gravity with observations, we therefore require ``lever arms" which translate predictions of quantum gravity at the Planck scale into testable predictions at much larger scales.
In this talk, I will introduce asymptotically safe quantum gravity as an example for which such a lever arm exists, which is the Renormalization Group flow of couplings - a ``microscope" for quantum field theories, which enables us to translate Planck-scale predictions to testable predictions, for instance for properties of elementary particles in the Standard Model and beyond, for example for dark matter.
Tuesday, 6 May 2025
10:00
How to MPIK
Lobby area (red sofas), Library
International Office/Administration
We will focus on VBL (classic/extra) and also answer all kinds of questions about the daily work routine at MPIK. The event is of course intended for new employees, internationals, but also for old employees who have to deal with certain problems with the administration in Germany or at MPIK.
11:15
Seminar Theoretische Quantendynamik
Cedric Quint, MPIK
Stringent Constraints on New Pseudoscalars from Precision Hyperfine Splitting Measurements
Seminarraum 242, Bothe Lab
16:30
Heidelberg Joint Astronomical Colloquium
Carlos Allende Prieto
New Tricks for the Analysis of Stellar Spectra
Stellar spectroscopy is going through a revolution, changing manual labor by automated processing and artificial intelligence, and replacing human observers and single-target instruments by robots and highly multiplexed spectrographs. Yet, improvements at the fundamental physics level are happening far slower, and the most popular stellar atmosphere models employed to interpret stellar spectra are based on codes originally written in the 1970's. In this talk I will discuss recent advances and reflect on what's missing to realize actual progress in our understanding of the assembly and early evolution of the Milky Way from the study of the most primitive stars. To arrange a visit with the speaker during the visit, please contact their host: Hans Ludwig (LSW)
17:00
Particle Colloquium
Dr. Brian Petersen
Neutrino measurements at the FASER experiment\n
Physikalisches Institut INF 226, Konferenzraum 1-3 (Room 00.101 bis 00.103)
Wednesday, 7 May 2025
15:00
Seminar Stored and Cooled Ions
Mira Newe and Marleen Maxton, MPIK
Using metastable C− ions to infer limits on room temperature radiation inside the CSR // Toward spectroscopy of highly excited states of H3+ at the CSR
Hybrid seminar: central seminar room, library building + Zoom: Meeting-ID: 915 1204 2752 Passcode: 758933
16:30
Zentrum für Quantendynamik Kolloquium
Dr. Torsten Zache
tba
Physikalisches Institut, INF 226, K 1-3
Thursday, 8 May 2025
11:15
Teekolloquium
Prof. Frédéric Merkt
Precision spectroscopy in one- and two-electron atoms and molecules
Grosser Hoersaal/Big Lecture Hall (library)
ARI Institute Colloquium
Emily Hunt
Improving the Milky Way star cluster census with Gaia and machine learning
ARI, Moenchhofstrasse 12-14, Seminarraum 1.OG
Star clusters are the one of the most useful places in the universe for studies of stellar and galactic evolution. Formed when stars collapse from the same molecular cloud into a cluster, star clusters offer a unique way to study stars of a homogeneous age and chemical composition across a range of masses. In the age of the Gaia satellite, the census of star clusters in our galaxy has exploded in size - but not without also presenting a number of challenges that require new machine-learning based techniques to solve. In this talk, I will present my work so far aiming to improve many aspects of the census of galactic star clusters in the age of Gaia. After an introduction to the field, I will start by discussing our published catalogue of over 7000 clusters, which represents the largest homogeneous unduplicated catalogue of Milky Way star clusters to date. I will discuss our recently published update to the original catalogue that measures the largest ever sample of cluster masses to better define them observationally, including many surprising results like that most clusters in the galaxy appear to have the same initial mass function - but only after first correcting for selection effects. I will discuss our ongoing work on the sampleÂs completeness and variable star content. Finally, I will discuss future avenues for research, including upcoming data releases like Gaia DR4 and the LSST.
16:15
Teilchen-Tee
Christian Fischer
Dynamical mass generation and restoration at finite temperature and density
Institut für Theoretische Physik, Phil12, SR106 (Pretalk 15:30)
The physics of the strong interaction (QCD) of quarks and gluons has profound implications for the world we live in. Almost all the mass of visible matter is generated dynamically be the strong interaction and the loss of this mechanism at large temperatures and densities is important for the physics of the early universe and dense stellar objects such as neutron stars. In this talk we discuss the interplay of dynamical mass generation from the strong and electroweak interactions and explore the consequences for phase transitions of the strong interaction at finite temperature and chemical potential. Using a functional approach to QCD we illustrate the search for a critical end point and outline possible strategies to explore the cold and dense region of the QCD phase diagram.
Friday, 9 May 2025
17:00
Physikalisches Kolloquium
Prof. Dr. Johannes M. Henn
Positive Geometry in Particle Physics and Geometry\n\n
KIP, INF 227, Hörsaal 1
Tuesday, 13 May 2025
11:15
Seminar Theoretische Quantendynamik
Lorenzo Tamburino Ventimiglia di Monteforte, MPIK
TBA
Seminarraum 242, Bothe Lab
14:15
Kosmologie und Elementarteilchenphysik
Angus H. Wright
TBA
Institut für Theoretische Physik, Online
TBA
16:30
Heidelberg Joint Astronomical Colloquium
Sandro Tacchella
The tumultuous life of early galaxies: bursty star formation and the build-up of disks
I will present the latest insights into the formation pathways of early galaxies, placing them in the broader context of self-regulated galaxy growth observed both today and during cosmic noon. Beginning with new theoretical developments from the cosmological THESAN-zoom simulations, I will explore how early star formation is regulated, how galaxies evolve along the star-forming main sequence, and how their sizes increase over cosmic time. I will then connect these theoretical predictions to recent JWST observations from NIRCam and NIRSpec as part of the JADES survey  one of the most extensive observational campaigns conducted with JWST. I will highlight the diversity of galaxies at cosmic dawn (redshift z>10), where vigorous star formation and black hole growth are prevalent. Next, I will examine the role of mergers in shaping galaxy evolution and discuss the emergence of disk-like structures during the Epoch of Reionization (z=4-10). I conclude by placing observational constraints on the morphological evolution of galaxies within the framework of star formation variability, providing a comprehensive view of how early galaxies grew and evolved. To arrange a visit with the speaker during the visit, please contact their host: Richard Tuffs
