Regensburg Center for Ultrafast Nanoscopy

RTG Colloquium: Dr. Ching-Ju Tsai / Prof. Dr. Sascha Schäfer / Dr. Jörg Standfuss
2024-11-08 13:00 - 16:00 (Europe/Berlin)
13:00Role Model SpotlightDr. Ching-Ju TsaiLab. for Biomolecular Research,PSI Center for Life Sciences, Switzerland

Debating whether to stay in academia while considering starting a family? The challenge intensifies if your partner is also a scientist, potentially in the same field. Balancing dual careers, raising children, and possibly relocating away from family and friends can be tough.Join us for an engaging “Role Model Spotlight” session, featuring Dr. Ching-Ju Tsai, as she shares her personal experiences and insights on navigating these challenges.We welcome the audience to actively participate by asking questions when we delve into questions like:

Understanding the planable vs. unpredictable aspects of academic careers.Come join us for this insightful discussion, complemented by coffee, tea, and some sweets. We look forward to your participation.

Strategies and support systems for effectively managing dual career paths in academia.

Navigating the unique challenges and opportunities of pursuing a scientific career while raising children.

Critical transitions from earning a PhD to securing a permanent academic position.

14:00Investigating ultrafast nanoscale dynamics with electrons and X-raysProf. Dr. Sascha SchäferRegensburg center for ultrafast nanoscopy

As an introduction to the lecture by Jörg Standfuss, I will give an overview on current methodologies in ultrafast electron and X-ray imaging with a focus on:(1) the key properties of available pulsed sources,(2) a comparison between imaging, diffraction and holograpy approaches and(3) important limitations by beam-induced sample damage.

15:00Photopharmacology Across Time and Space: Molecular Insights via X-ray Free Electron LasersDr. Jörg StandfussLab. for Biomolecular Research, PSI Center for Life Sciences, Switzerland

Structural biology has been critical for our understanding of how proteins work on the molecular level. However, resolving the temporal evolution of biological macromolecules in response to activating stimuli—such as the binding of small molecular ligands or drug molecules—remains a challenge. In recent years, our research group has leveraged X-ray Free Electron Laser facilities to experimentally investigate how retinal-binding rhodopsins, acting as pumps, channels, or light sensors, are activated at the atomic level across a wide range of time scales.In our latest experiments at the Swiss X-ray Free Electron Laser, we explored how photoactive azobenzene compounds, mimicking retinal, can be used to trigger protein dynamics for structural studies. My presentation will focus on the dissociation dynamics of the photopharmacological drug candidate azo-combretastatin A4 from tubulin, capturing events from the initial photochemical reaction in the femtosecond range, through the disruption of high-affinity protein-ligand interactions in nanoseconds, adaptation of the binding pocket in microseconds, and the eventual release of the compound in milliseconds. I will discuss the relevance of these findings for our understanding of how anti-cancer drugs destabilize the microtubule network. Furthermore, I will propose the use of azobenzene-based photoswitches to trigger G protein-coupled receptors and other pharmacologically relevant targets in time-resolved structural biology experiments.

RTG Colloquium: Complexity with a purpose: Long range collective vibrations steering protein conformational change
2024-11-15 14:00 - 15:00
RUN auditorium

Prof. Dr. Andrea Markelz

University at Buffalo College of Arts and Sciences

The evolutionary advantage of the large-scale structure of proteins surrounding the biochemically active site is not readily apparent. It has been speculated that the structural dynamics provide long-range control of access to the active site. Through anisotropic terahertz micro-spectroscopy (ATM) measurements we find that the photo initiation of orange carotenoid protein’s (OCP) photocycle is accompanied with switching in the protein structural vibrations, before long range structural change can occur. The ATM spectral changes are reversible and calculations reproduce the changes in ATM spectra, with features red shifted from the measurements. Averaging the vibrational displacement autocorrelation matrix over the spectrally relevant region and thermally occupied starting configurations finds changes in the correlations for residues 80-113 with residues 151-164, and for residues 280-291 with residues 265-275. These regions are those previously predicted to be involved in the structural modification necessary for a critical step in the photocycle. The results provide the first evidence that structural vibrational change can actuate conformational change for function.

Young Colloquium:Hochschulbildung im 21. Jh. im Kontext einer nachhaltigen Entwicklung: Was können Studierende tun? - Perspektive der Erziehungswissenschaften
2024-11-21 16:15 - 17:30
Prof.in Dr. Mandy Singer-BrodowskiUniversität Regensburg

Young Colloquium:Herausforderungen in der Frauen- und Diversitätsforschung für eine nachhaltige Zukunft - Perspektive der Wissenschafts- und Technikgeschichte
2024-12-05 16:15 - 17:30
Prof.in Dr. Andrea ReichenbergerTechnische Universität München

Prof. Dr. Maria Chekhova:Bright squeezed vacuum and its applications in strong-field physics
2024-12-13 14:00 - 15:00
Max-Planck-Institut für die Physik des Lichts, ErlangenStrongly pumped parametric down-conversion produces a state of light that, on the one hand, is as intense as laser light, and on the other hand, has pronounced quantum features. This state, known as bright squeezed vacuum, has zero mean electric field and consists only of quantum fluctuations, enhanced or suppressed on a subcycle scale. Recently, we have used this state to drastically modify the dynamics of strong-field effects, such as non-perturbative harmonics generation and electron ejection from needle tips.

Venue: RUN auditorium

Host: GRK 2905, Rupert Huber

Dr. Francesco Intravaia: Unpacking Electromagnetic Quantum Fluctuation-Induced Interactions
2024-12-13 15:00 - 15:45
Humboldt Universität zu BerlinFluctuations are ubiquitous in both classical and quantum realms, underpinning a wide range of phenomena across physics, from biophysics and chemistry to gravity and cosmology. In the ongoing race toward miniaturization, interest in electromagnetic quantum fluctuation-induced interactions has surged—not only for foundational insights but also for technological applications. While many of these interactions are negligible at macroscopic scales, they become crucial at microscopic scales, posing both challenges and opportunities for modern quantum technologies. Paradigmatic examples include van der Waals and Casimir interactions, which can be either advantageous or disruptive in the design of microscopicdevices.The study of these phenomena draws on a highly interdisciplinary background, merging advances in nonequilibrium physics, quantum electrodynamics, atomic physics, and condensed matter physics. Unpacking electromagnetic quantum fluctuation-induced interactions opens up new perspectives, deepening our understanding of the underlying physics and paving the way for future advancements in the field.

Venue: RUN auditorium

Host: GRK 2905, Rupert Huber

Prof. Dr. Giulio Cerullo:2D semiconductors: a platform for ultrafast photonics
2025-01-09 14:00 - 15:00
Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy

Layered materials are solids consisting of crystalline sheets with strong in-plane covalent bonds and weak van der Waals out-of-plane interactions. These materials can be easily exfoliated to a single layer, obtaining two-dimensional (2D) materials with radically novel physico-chemical characteristics compared to their bulk counterparts. The field of 2D materials began with graphene and quickly expanded to include semiconducting transition metal dichalcogenides(TMDs). 2D semiconductors exhibit very strong light-matter interaction and exceptionally intenseand ultrafast nonlinear optical response, enabling a variety of novel applications in optoelectronics and photonics. Furthermore, stacking 2D materials into heterostructures (HS) offers unlimited possibilities to design new materials tailored for applications. In such HS the electronic structure of the individual layers is well retained because of the weak interlayer van der Waals coupling. Nevertheless, new physical properties and functionalities arise beyond those of their constituent blocks, depending on the type, the stacking sequence and the twist angle of the layers. This talk will review our recent studies on the ultrafast non-equilibrium optical response of TMDs and their HS. Using high time resolution ultrafast transient absorption (TA) spectroscopy, we monitor the ultrafast onset of exciton formation in TMDs and the dynamics of strongly coupled phonons. Using helicity resolved TA spectroscopy we time-resolve intravalley spin-flip processes. In HS of TMDs we measure ultrafast interlayer hole transfer, interlayer exciton formation and use two-dimensional electronic spectroscopy to dissect interlayer electron and hole transfer processes. We also show that strong exciton nonlinear interactions can lead to a complete quenching of the Rabi splitting in TMD-based microcavities. The demonstrated ultrafast switching between the strong and weak coupling regimes paves the way for the development of TMD based high speed all-optical circuits and neural networks.

Young Colloquium:Umgang mit Trends in der Naturwissenschaft - Perspektive des Quantum Computing
2025-01-09 16:15 - 17:00
Prof. Dr. Rainer BlattUniversität Innsbruck

Quantentechnologien bieten das Potenzial für verbesserte Kommunikation, Metrologie, Simulationen und Berechnungen. In diesem Vortrag werden die grundlegenden Funktionsprinzipien der Quanteninformationsverarbeitung kurz vorgestellt und über den Stand der Technik des Innsbrucker Quantencomputers mit gespeicherten Ionen berichtet. Die Rechenkunst mit Hilfe der Quantenphysik wird anhand von Quantensimulationen illustriert,die Wege für eine neue Informationsverarbeitung aufzeigen. Ein kommerziell erhältlicher NISQ-Quantenprozessor wurde von AQT entwickelt und steht bereits für industrielle Anwendungen zur Verfügung.

RTG Colloquium: Prof. Dr. Rainer Hillenbrand & Dr. Alex Weber-Bargioni
2025-01-17 14:00 - 15:45
14:00 hProf. Dr. Rainer Hillenbrand:Optical near-field nanoscopyNanoscience research center CIC nanoGUNE in San Sebastian

By recording the radiation scattered by a laser-illuminated atomic force microscope tip, imaging and spectroscopy with nanoscale spatial resolution can be achieved in the broad spectral range from visible to terahertz frequencies. This talk will provide an overview of the technique and discuss some of our recent applications in materials science and polariton imaging.

15:15 hDr. Alex Weber-Bargioni:Controlling and Protecting Quasiparticles in 2-D Quantum MaterialsLawrence Berkeley National Laboratory

In this presentation, we explore how new types of particle-like excitations, known as quasiparticles, can be controlled and stabilized within ultra-thin materials—so-called 2-D solids—by creating carefully designed atomic hetero structures. Quasiparticles are not fundamental particles like electrons or protons, but instead arise from the complex interactions between particles in a solid. They include phenomena such as excitons (bound states of electrons and holes), superconducting states, and polaritons (hybrids of light and matter), as well as more exotic systems like Tomonaga-Luttinger liquids.

Each of these quasiparticles emerges due to the unique symmetries of the crystal structure.By engineering precise atomic-scale patterns (heterostructures) within 2-D materials, we can not only create new types of quasiparticles but also protect and manipulate them for potential applications. For instance, heterostructures that confine matter in zero, one, or two dimensions allow us to control these emergent properties with unprecedented precision. In the first part of my talk, I will focus on excitons—quasiparticles formed by electron-hole pairs. We have investigated excitons in stacks of the 2-D materials WS₂ and WSe₂, which are promising candidates for next-generation quantum technologies. These stacks potentially host Bose-Einstein Condensates, a state where excitons behave like a collective whole. By coupling these excitons to nanoscale light traps (plasmonic cavities), we have been able to study how they emit light, particularly “dark excitons,” which don’t normally emit photons. Additionally, we provide evidence of excitons traveling coherently over distances when coupled to plasmons, forming a new hybrid quasiparticle called a plexciton.In the second part of the talk, I will explore defects in 2-D materials that act as quantum emitters, which are critical for applications like quantum sensing. Using a high-precision technique called photo Scanning Tunneling Microscopy (photo-STM), we examine how tiny imperfections in the crystal structure of MoSe₂ and WS₂—such as missing atoms—create unique energy states within the material’s band structure. These defects can emit single photons, which is a key requirement for quantum technologies. We have also shown how replacing individual atoms in the structure with elements like carbon or cobalt creates well-defined systems similar to color centers in diamonds, opening the door to new sensing and computational devices.Finally, I will discuss how certain 1-D defects in 2-D materials—mirror twin boundaries—act as atomically thin conductors, which display a remarkable transition into a quantum liquid state at low temperatures. These systems give us new insights into highly correlated electron states, including superconductivity.

Venue: RUN auditorium

Young Colloquium:Zwischen Forschung und Interessen: Wie die Wissenschaft die politische Bühne prägt
2025-01-20 16:15 - 17:45
Prof. Dr. Andreas LöschelRuhr-Universität Bochum

Prof. Dr. Klaus RichterUniversität Regensburg

Young Colloquium:Predicting the future: How does climate modelling work? - Perspektive der Geophysik
2025-01-23 16:15 - 17:45
Prof. Dr. Tiffany A. ShawUniversity of Chicago

RTG Seminar: Cavity optomechanics in the few photon regime using nanowires and photonic crystals
2025-02-17 09:30 - 10:30
Institut Néel; Université Grenoble-Alpes

Huge developments have been done in the field of cavity optomechanics, essentially by using large photon number to enhance the weak optomechanical interaction. Thus, in our work, we aim at approaching the single photon regime, where a single photon in the cavity mode can have an appreciable impact on the nanowire, which requires g_0>Ωm. This requires operating with ultrasensitive force sensors with small mode volume microcavities, which enhance the electromagnetic field per photon. To do so, we employ photonic crystal (PhC) cavities fabricated at C2N and suspended SiC nanowires, whose vibrating extremity is inserted into the evanescent cavity field. The nanowire being smaller than the wavelength, this allows us to image this confined light field, and to map the optomechanical coupling strength. Then, equiped with a probe laser and an external driving electrode, we measure and map the optomechanical force experienced by the nanowire. Our results are compared to numerical simulations, which also allows to understand the proximity forces arising when approaching the nanostructures.

Venue: RUN 0.35

RTG Kolloquium:Introduction to Floquet theory
2025-05-09 14:00 - 15:00
Location: RUN auditorium

How to characterize properties of a quantum system subject to an intense time-periodic drive? We shall address this question within the framework of Floquet theory. According to the Floquet theorem, the solutions of the time-dependent Schrödinger equation display a quasi-stationary evolution, governed by quasi-energies, and a periodic part. Working in the Sambe space, it is possible to evaluate both the so-called quasi-energy spectrum and the Floquet functions without resorting to perturbation theory in the strength of the time-periodic drive or other commonly used approximations. Noticeably, the quasi-energy spectrum can be qualitatively different from the one of the undriven Hamiltonian, opening pathways to manipulate properties of quantum systems by a time-periodic drive. These concepts will be illustrated on the example of a strongly driven two-level system.

Prof. Dr. Milena GrifoniUniversity of Regensburg

RTG Colloquium:Franz Giessibl & Sabine Maier
2025-06-06 14:00 - 16:00
2 pmAtomic Force Microscopy (AFM)

Prof. Dr. Franz J. GießiblUniversity of Regensburg

3 pmBottom-up fabrication and electronic structure ofatomically precise low-dimensional materials

Prof. Dr. Sabine MaierFAU Erlangen-Nürnberg

RTG Colloquium:Jan Vogelsang & Gerti Beliu
2025-07-04 14:00 - 16:00
2 pmFrom Single-Molecule Fluorescence Spectroscopy to (Fast) Super-Resolution Microscopy

Dr. Jan VogelsangUniversity of RegensburgInstitute of Experimental and Applied Physics

3 pmClick.Tag.Image – A Hitchhiker’s Guide to Molecular Bioimaging

Prof. Dr. Gerti BeliuUniversity of RegensburgInstitute of Pharmacy

RTG Colloquium:Ulrich Höfer
2025-07-11 14:00 - 15:00
Title: tba

Prof. Dr. Ulrich HöferUniversity of Regensburg

RUN run
2025-07-16 17:00 - 19:00

RTG Seminar:Patrick Rupprecht
2025-07-23 14:00 - 16:00
Venue: RUN auditorium 1st floor

Shedding light on ultrafast quantum dynamics with attosecond spectroscopy

The physics and chemistry of matter is determined by the interaction of electrons and nuclei on ultrafast timescales down to the attosecond (10-18 s) regime. In this seminar, I will highlight how attosecond photon spectroscopy grants us a detailed look into the intricate quantum dynamics within atoms and molecules. Beyond precision metrology, shortest laser pulses allow us to precisely manipulate the quantum interactions of electrons and nuclei.

Patrick Rupprecht

Feodor Lynen Postdoctoral FellowLeone & Neumark GroupsLawrence Berkeley National LaboratoryUSA

RUN Colloquium:Prof. Dr. Elmar Behrmann
2025-07-25 14:15 - 15:15
Venue: RUN auditorium 1st floor

One is the loneliest number

Artificial intelligence, or more precisely machine learning, is not only revolutionising our daily lives, it has also become an essential tool for science. In structural biology, deep learning tools such as Alphafold or RoseTTAFold promise to provide protein structures at the click of a button. However, because these tools are based on extrapolating information from existing knowledge, they tend to underestimate the creativity of evolution in finding new applications for existing protein folds. Cryo-electron microscopy, on the other hand, as an image-based method, allows proteins to be visualised at near-atomic resolution without requiring prior assumptions about protein structure, and is therefore ideally suited to reveal such new applications for existing folds.

In my talk, I will use three recent examples from our lab – a light-sensitive protein that helps marine worms sense the phase of the moon, a synaptic scaffolding protein that helps our brain balance its activity, and an immunoreceptor protein that helps a plant defend itself against pathogenic fungi – to highlight the power of cryo-EM to reveal unexpected oligomeric assemblies and resolve them to near-atomic resolution, thereby improving our functional and mechanistic understanding of these proteins.

Prof. Dr. Elmar BehrmannUniversity of Cologne

RTG Seminar:Martin Švec
2025-07-29 14:00 - 16:00
Venue: RUN.0.35

Photon-induced processes at single molecules in SPM nanocavities

Exploration of isolated chromophores – optically active molecules – often reveals stunningly complex internal dynamics of excitations and transitions between electronic configurations, influenced by coupling to vibrational levels and reorganization of local environments. One of the promising tools for studying the photophysics of individual molecules with nanometer resolution is optical spectroscopy that employs plasmonic, atomically sharp tips in Scanning Probe Microscopy (SPM), which overcomes the fundamental spatial resolution limits of visible and infrared light. This methodology enables measurements that correlate electronic structure and atomic arrangement with various photon spectroscopies – e.g., fluorescence, absorption, and Raman scattering – as a function of applied electric field and measurement geometry. In this lecture, I will present our experiments with photon spectroscopies using SPM, focusing in particular on photon absorption-induced phenomena such as photoluminescence, and photon-induced current generation, through which we achieved a direct visual discrimination among the components of a multiconfigurational state of an open-shell chromophore.

Martin Švec

Institute of PhysicsCzech Academy of SciencesPraha 6,Czech Republic

RTG Seminar:Dr. Carolin Gold
2025-09-22 10:00 - 11:00
Venue: RUN auditorium 1st floor

From microscopic to macroscopic phenomena:Bridging length scales in two- dimensional quantum materialsColumbia University

Two-dimensional quantum materials have driven a revolution in condensed matter physics through the realization of a large variety of exotic quantum phenomena, ranging from strong correlations and quantum magnetism to topological states. At the core of this revolution is the unique tunability of the quantum phases emergent at the macroscopic scale through variations in the microscopic roperties of the material. Despite decades of intensive theoretical and experimental endeavors, bridging these two length scales has remained a major challenge, leaving numerous questions nanswered.In this talk, we demonstrate how atomic force microscopy (AFM) can be used not only to (i) probe quantum electronic states across multiple length scales, but also to (ii) locally control and engineer the interplay between microscopic and acroscopic properties in van der Waals materials. Using the AFM tip as a mechanical actuator we bend narrow van der Waals ribbons, realizing (moiré) heterostructures with engineered twist angle and strain gradients. Combining these structures with low-temperature conductive AFM imaging not only reveals their unique electronic properties, but also opens exciting avenues for studying the interplay between microscopic and macroscopic length scales through versatile and novel AFM techniques.

Young Colloquium:Einführungsveranstaltung
2025-10-23 16:15 - 17:45
Prof. Ferdinand Evers, Franziska Fröhlich, Philipp Erhardt, Simon Spörl

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Young Colloquium Overview
2025-10-23 16:15 - 2026-01-29 17:45 | RUN Auditorium 1st floor
Unser nächster Vortrag zum Thema “Podiumsdiskussion: Quo Vadis, Lehrerbildung? Perspektiven im Dialog” findet am 08.01.2026 statt.

Die Idee: Scientific Perspectives on Global Issues of the 21st Century

Wie begegnen wir den drängenden globalen Herausforderungen unserer Zeit – von der Klimakrise über soziale Ungleichheit bis hin zu den Auswirkungen neuer Technologien? Wissenschaft liefert wichtige Erkenntnisse und Lösungsansätze, doch deren Umsetzung hängt von politischen, wirtschaftlichen und gesellschaftlichen Entscheidungsprozessen ab. Nachhaltige Entwicklung ist daher kein rein technisches, sondern ein zutiefst politisches Thema. Das Young Colloquium stellt die Frage, wie wissenschaftliche Erkenntnisse zur Bewältigung dieser Herausforderungen beitragen können und welche politischen Rahmenbedingungen es braucht, um wirksame Veränderungen anzustoßen.

Als studentisch organisierte, interdisziplinäre Vortragsreihe geht es uns besonders darum, die Diskussion etwa in den an die Vorträge anschließenden Diskussionen in entspannter Runde bei Pizza und Getränk anzuregen. Genug Material zum Diskutieren finden wir erfahrungsgemäß nach den Vorträgen auf jeden Fall: nicht umsonst sind die Probleme, um die es geht, noch nicht gelöst… Das soll uns aber nicht davon abhalten uns Gedanken darüber machen, wie man konstruktiver an die Lösungen herangehen könnte und inwiefern der Dialog zwischen Wissenschaft und Gesellschaft eine Rolle darin spielen könnte. Wir freuen uns auf viele neue Gesichter in der dritten Auflage der Veranstaltung! 🙂

Unsere Vorträge im WS 2025

Unsere Vorträge fallen in diesem Semester grob unter drei große Themenbereiche: Technologie, Politik und Gesellschaft. Die Zuordnung zu einem dieser Bereiche soll dabei nur die Schwerpunktsetzung der Vorträge verdeutlichen; die meisten Vortragsthemen könnte man vermutlich jedem Bereich zuordnen.

Terminübersicht

Hier eine genaue Auflistung unserer Termine und Vortragenden, die Vortragstitel werden nach und nach hinzugefügt:

Datum23.10.2025EinführungsveranstaltungProf. Ferdinand Evers, Franziska Fröhlich, Philipp Erhardt, Simon Spörl06.11.2025Anonym im Internet – Die Technik hinter dem DarknetProf. Björn Scheuermann13.11.2025Künstliche Intelligenz. Innovation, Grenzen und HerausforderungenProf. Klaus Mainzer20.11.2025Raus aus dem Elfenbeinturm! Muss Wissenschaft auf soziale Medien?Dr. Josef Gaßner04.12.202517 Uhr!Kritische Rohstoffe in Zeiten geopolitischer KonflikteProf. Christoph Helbig18.12.2025Wie weiter mit der Wissenschaftsfreiheit in Trumps Amerika?Prof. Volker Depkat08.01.2026Podiumsdiskussion: Quo Vadis, Lehrerbildung? Perspektiven im DialogProf. Thorsten Bohl und Dr. Alfred Lindl 15.01.2026Errungenschaften der Deutschen E-MobilitätTim Wölfel, Dr. Adrian Prochaska29.01.2026KlimaforschungDr. Tiffany Shaw05.02.2026AbschlussveranstaltungProf. Ferdinand Evers, Franziska Fröhlich, Philipp Erhardt, Simon Spörl

Genauere Informationen zu den einzelnen Vorträgen, der Anrechnung und der Veranstaltung im Allgemeinen finden sich auch im zugehörigen GRIPS Kurs oder auf Instagram.Die Vorträge finden normalerweise von 16-18 Uhr c.t. im Konferenzraum des RUN (RUN 1.03) statt und setzen sich aus einem 60 min Vortrag und einer 30 min Frage-/Diskussionsrunde zusammen. Im Anschluss sind alle herzlich eingeladen mit uns in gemütlicherem Setting mit Pizza weiterzudiskutieren!

Anrechnung an der Uni Regensburg

Das Young Colloquium ist für alle Studierende offen, egal ob ihr nur einen Vortrag anhören möchtet oder jedes mal mit dabei seid. Es besteht allerdings zusätzlich die Möglichkeit, sich das Young Colloquium als Modul mit 3 ECTS anrechnen zu lassen. Dafür müsst ihr:

bei allen Vorträgen (mit Ausnahme eines möglichen Fehltermins) anwesend sein

einen zwei bis dreiseitigen Essay verfassen und vorstellen, in dem ihr euch mit den Themen der Vortragsreihe auseinandersetzt

Das Young Colloquium ist unter anderem anrechenbar in

den kombinatorischen B. A. der Geisteswissenschaften

B. Sc. Physik und Mathematik

weitere Studiengänge auf Anfrage

Wir arbeiten daran, die Anrechnung für Studierende aller Fachrichtungen möglich zu machen; schreibt uns gerne eine Email an young.colloquium@uni-regensburg.de wenn ihr an der Veranstaltung interessiert seid und euer Studiengang hier nicht aufgelistet ist. Schaut ansonsten gerne für weitere Infos zur Anrechnung und der Veranstaltung im Allgemeinen bei der Einführungsveranstaltung am 23.10. vorbei.In jedem Fall ist die Anrechnung nur ein Angebot: Wir freuen uns über jeden Besuch, auch wenn ihr nur einmal vorbeischaut!Eure Organisatoren,Franzi, Philipp und Simon

Young Colloquium:Prof. Björn Scheuermann
2025-11-06 16:15 - 17:45
Anonym im Internet – Die Technik hinter dem Darknet

Wer sich unbeobachtet im Internet bewegen will, benötigt Wege, die eigene Adresse im Netz sowohl vor dem Kommunikationspartner als auch gegenüber Betreibern von Internet-Infrastruktur zu verbergen. Das Tor-Netzwerk ermöglicht dies, es stellt ein essentielles Werkzeug beispielsweise zur Umgehung von Internetzensur in repressiven Staaten dar. In dem Vortrag schauen wir uns an, wie Tor Kommunikation ermöglicht und gleichzeitig den Standort der Kommunikationspartner verbergen kann. Wir beleuchten unterschiedliche technische Aspekte, diskutieren die Auswirkungen von Entwurfsentscheidungen und diskutieren ihre Auswirkungen auf die Nutzbarkeit und Anonymität.

Prof. Dr. Björn ScheuermannTU Darmstadt

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Young Colloquium:Künstliche Intelligenz. Innovation, Grenzen und Herausforderungen
2025-11-13 16:15 - 17:45
Wir leben bereits in einer vernetzten Welt intelligenter Systeme. Künstliche Intelligenz (KI) wird zu einer gesellschaftlichen Herausforderung, wenn sie unsere Lebens- und Arbeitswelt (z.B. Mobilität, Märkte, Industrie 4.0) automatisiert. Was aber genau heißt „KI“ heute, die in aller Munde ist? KI ist kein Hexeneinmaleins! Ihre Grundlagen lassen sich genau erklären und die Frage beantworten: Was kann KI und was kann sie (noch) nicht? Mit neuartigen Algorithmen, großen Rechen- und Kapazitäten zeichnen sich spektakuläre Innovationen ab, die Wissenschaft, Wirtschaft und Gesellschaft dramatisch verändern. Allerdings stellen sich auch Fragen der Verantwortung: Was darf KI und was nicht? Welche Herausforderungen sind mit dem wachsenden Bedarf an Energie und Materialien verbunden? Erst auf dieser Grundlage lassen sich gesellschaftliche Konsequenzen ziehen. Erst auf dieser Grundlage können Deutschland und Europa Position im globalen Wettstreit der KI beziehen. Dieser Vortrag ist ein Plädoyer für Technikgestaltung: KI muss sich als Dienstleistung in Wissenschaft, Wirtschaft und Gesellschaft bewähren.

Prof. Klaus MainzerEmeritus of Excellence, TU MünchenPräsident der Europäischen Akademie für Wissenschaften und Künste (EASA)

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Young Colloquium:Raus aus dem Elfenbeinturm! Muss Wissenschaft auf soziale Medien?
2025-11-20 16:15 - 17:45
Die sozialen Medien haben die Diskussionskultur stark gewandelt – gleichzeitig wurden neue Wege für die Wissenschaftskommunikation eröffnet. Welche Plattformen eignen sich grundsätzlich und wie bespielt man sie erfolgreich? Welche Fallstricke gilt es dabei zu vermeiden? Wie verändert die Aufbereitung von komplexen Themen für eine breite Öffentlichkeit den (die) Wissenschaftler(in) selbst? Der Astrophysiker und YouTuber Josef M. Gaßner teilt persönliche Erfahrungen aus seinem Alltag und lädt ein zu einer Diskussionsrunde.

Diese Veranstaltung findet in Kooperation mit dem GRK 2905 – Ultrafast Nanoscopy statt.

Dr. Josef GaßnerAstrophysiker und YouTuber

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RTG Colloquium: Prof. Dr. Miriam Serena Vitiello
2025-11-21 14:00 - 15:00
Venue: RUN auditorium 1st floor

Detector-less near-field quantum nanoscopyin the far-infrared

Near-field nanoscopy at terahertz (THz) frequencies (wavelength range, 3 mm – 3 μm) enables studies of objects over a large span of scales – from 300 μm to the nanometer scale – and disciplines, from physics to biological science. The talk will show the potential of a series of near-field nanoimaging approaches that, while exploiting the same core building block (a detector-less QCL-based nanoscope), rely on different physical mechanism for imaging reconstruction. I will also highlight their potential for tracing the realspace propagation of THz-frequency polaritons in isotropic and anisotropic nanomaterials and metaelements.

Prof. Dr. Miriam Serena VitielloNEST, CNR – Istituto Nanoscienze and Scuola Normale Superiore, Pisa, Italy

Special lecture:Prof. Dr. Sebastian Loth
2025-11-28 14:00 - 16:00
Venue: RUN auditorium 1st floor

Stochastic and coherent dynamics of spins and electrons at the atomic scale

Many fascinating phenomena at the atomic scale, such as energy transfer between quantum systems or collective behavior of electrons in correlated materials, remain hidden to static measurements. The combination of ultrafast spectroscopy with scanning probe microscopy presents a unique opportunity to study the dynamics of matter locally at its intrinsic length and time scales. This lecture introduces recent advances using all-electronic microwave spectroscopy to capture quantum dynamics of magnetic atoms and small quantum magnets, as well as lightcoupled THz pump-probe techniques with femtosecond resolution that reveal phonon propagation and collective excitations in charge-density wave materials.

Prof. Dr. Sebastian LothInstitute for Functional Matter and Quantum Technologies, University of Stuttgart

Young Colloquium:Kritische Rohstoffe in Zeiten geopolitischer Konflikte
2025-12-04 17:15 - 18:45
Vom Smartphone bis zum Elektroauto hängen unsere Zukunftstechnologien an wenigen kritischen Rohstoffen, die immer mehr zum Spielball geopolitischer Konflikte werden. Tauch ein in die Welt globaler Lieferketten und erfahre aus erster Hand, warum Versorgungsengpässe bei Lithium oder Seltenen Erden unsere Energiewende bedrohen. Diskutiere mit uns, wie Europa durch Recycling und strategische Partnerschaften seine Unabhängigkeit sichern kann.

Prof. Christoph HelbigUniversität Bayreuth, Lehrstuhl für Ökologische Ressourcentechnologie

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Young Colloquium:Wie weiter mit der Wissenschaftsfreiheit in Trumps Amerika?
2025-12-18 16:15 - 17:45
Der Angriff des Staates auf die Wissenschaftsfreiheit in Trump-Amerika ist präzendenzlos. Die radikale konservative Kulturagenda der Trump-Regierung führt zu einer Wissenschaftspolitik, die nicht nur massive finanzielle Einschnitte in Forschung und Lehre mit sich bringt, sondern vor allem auch ein Klima der Angst in der Wissenschaft erzeugt, das das wissenschaftliche Streben nach Erkenntnis nachhaltig zu vergiften droht.Jenseits aller Tagespolitik ist der Kulturkampf zwischen dem konservativen und dem liberalen Amerika ein Ringen zwischen Rationalität und Irrationalität. Dieses Ringen ist ungeachtet aller zurückliegenden politischen Angriffe auf die Wissenschaftsfreiheit in den USA noch lange nicht entschieden, denn das US-amerikanische Wissenschaftssystem ist in vieler Hinsicht robuster und resilienter als das deutsche.

Prof. Volker DepkatUniversität Regensburg

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