Zeit / Time
Mittwochs / Wednesday , 16.00 Uhr c.t.
In den Medien, in der Politik, aber auch in der Wissenschaft existieren zwei Denkrichtungen:
Die Wirklichkeit des Jahres 2045 wird aller Wahrscheinlichkeit nach durch keines dieser beiden Zukunftsbilder beschrieben werden.
Der Vortrag versucht, eine neutrale Darstellung zu geben.
Ausgehend von den verschiedenen Wegen der Herstellung von klimaneutralem Wasserstoff und dessen Einsatzes in den Sektoren Verkehr, Raum- und Prozesswärme sowie Stahl und Chemie werden verschiedene Aspekte des Hochlaufes einer Wasserstoffwirtschaft dargestellt.
local host: Prof. Dr. Horst Schmidt-Böcking | firstname.lastname@example.org
Vibrations are sensitive probes of molecular structure and dynamics. Interrogated by ultrafast infrared pulse sequences, local vibrations provide information on structure changes of molecules from the size of a few atoms to large proteins and from femtoseconds to milliseconds, which we demonstrate for the case of photoreceptor proteins.
But vibrations are also important active players in (bio-)molecular dynamics. Using a two-dimensional infrared correlation spectroscopy, we detected underdamped, THz motion of proteins proposed to enhance enzyme catalysis. Vibrations are also involved in energy transfer processes in proteins. We developed genetically encoded vibrational energy injectors and sensors to track energy transfer in proteins on the picosecond time scale on the level of single amino acids.
Excitation of vibrations can be used to manipulate molecular systems. In our VIPER (vibrationally promoted electronic resonance) 2D-IR spectroscopy, we exploit vibronic couplings to change the UV/VIS spectrum of molecular systems by mid-IR pulses. Applications are discussed from controlling chemical reactions over optoelectronics to photobiology.
local host: Dr. Benesh Joseph | email@example.com
The collective behavior of many interacting particles in solids gives rise to a wealth of fascinating phenomena. While a full theory of many particles is typically out of reach, there are usually only a few parameters relevant for the description of the low-energy material properties. It is often convenient to introduce effective quasiparticles, whose properties govern the response of the solid at low energies and which may or may not have counterparts as elementary particles in nature.
A key feature of a quasiparticle is that it cannot exist on its own, but it is intimately linked to its environment, with which it interacts. Hence, probing their properties can yield insight into the complex many-body state of the system. Moreover, as the properties of quasiparticles can be very exotic and potentially tunable, they provide excellent building blocks for novel devices.
In this talk I will discuss several examples of the sometimes surprising behavior of elementary excitations occuring in different states of matter ranging from ordinary Fermi liquids over excitons in semiconductors to topological superconductors and spin liquids. I will highlight how the peculiarities of quasiparticles can teach us about the entire system and potentially lead to new applications.
local host: Prof. Dr. Roser Valenti | firstname.lastname@example.org
local host: Prof. Dr. Jürgen Schaffner-Bielich | email@example.com
Prof. Dr. Roger Erb, Dekan des Fachbereichs Physik
Prof. Dr. Michael Huth, Vizepräsident Goethe-Universität Frankfurt
Prof. Dr. Dr. h.c. Volker Mosbrugger, Stiftungsratvorsitzender des FIAS
36 Jahre mit Horst (Reminiszenzen)
Verleihung einer Ehrendoktorwürde
Prof. Dr. Mark Gorenstein (Bogoljubov-Institut Kiew)
Prof. Dr. John Harris (Yale University)
Umtrunk und Imbiss im FIZ
Max-von-Laue Straße, 60438 Frankfurt
(Zur Planung bitten wir um Rückantwort bis zum 25.11.2022)
local host: Prof. Dr. Dirk Rischke | firstname.lastname@example.org
Chemical abundances derived from stellar spectra can be used to understand a number of physical quantities in the Universe. The origin of the elements formed after the Big Bang, heavy element nucleosynthesis, the enrichment from the First Stars, and chemical evolution of the Galaxy - these are some of the many aspects that stellar spectroscopy of old stars can help us understand.
Metal-poor, old, unevolved stars are excellent tracers as they preserve the abundance pattern of the gas they were born from. I will show how we can trace and constrain the physics of early rapid neutron-capture process events, and how we can trace the r-process observationally both directly and indirectly. Moreover, I will show how low-mass stars can help us map the nature of the long-gone First Stars and place constraints on, e.g., their mass. The low-mass stars we are analysing with world-class facilities, like the Very Large Telescope in Chile, allow us to chemically tag the early Universe at a redshift corresponding to z~7. In this quest, we have recently discovered a special carbon-rich group of stars that carry insight into the nature of the First stars.local host: Prof. Dr. René Reifarth | email@example.com
High power linear accelerators have been developed as essential tools for modern scientific research. Increasing the beam intensity, often leads to challenges from space charge effects, which are most pronounced in the RFQ (Radio-Frequency Quadrupole) accelerators due to the low beam velocity. This inaugural lecture will introduce the basic principle of RFQ accelerators and novel design approaches using dedicated emittance transfers along the RFQ.
These approaches can achieve not only efficient machines but also brilliant beams. Using examples of real RFQs developed for some recent projects, the beam physics behind these two new approaches as well as two well-known methods will be discussed.local host: Prof. Dr. Holger Podlech | firstname.lastname@example.org
.local host: Prof. Dr. Luciano Rezzolla | email@example.com