Institut für Theoretische Physik
Start / Aktuell / Institut
Mai  2015
Di
26.05.2015
SR 3, Institut für Theoretische Physik, A03.101
SFB 937
17:00
Seminar

Prof. Dr. Frieder Mugele
Physics of Complex Fluids Dept. Science and Technology University of Twente

Ion adsorption at solid-electrolyte interfaces: from atomic scale AFM imaging to macroscopic wetting transitions

The adsorption of ions to solid-liquid interfaces plays a key role in many physical, chemical and technological processes. Adsorbing ions control the surface charge, the chemical composition of a surface, secondary adsorption processes of organic molecules, etc. In this lecture, I will discuss a series of experiments that characterize the structure of the mineral-aqueous electrolyte interfaces for common inorganic salts and the macroscopici consequences. Using atomically resolved Atomic Force Microscopy imaging and spectroscopy, we demonstrate how divalent cations (Ca2+, Mg2+) adsorb much stronger to common silica and clay surfaces than their alkali counter parts (Na+, K+). Doing so, the adsorbing divalent reverse the charge of the solid surfaces and induce a macroscopic wetting transition from complete water wetting in ambient alkanes to partial wetting. Moreover, the adsorbed divalent cations - which remain hydrated according to complementary Density Functional Theory calculations - promote the adsorption of fatty acids and thus the formation of organic deposits on the surface. This process is believed to play an important role for the industrial recovery of crude oil from geological reservoirs.

Kontakt: Köster
Do
28.05.2015
Seminarraum A.04.101
Theoretische Physik
14:15
Theoretisch-physikalisches Seminar

Michele Burrello
MPI Garching

Topological Properties in a Ladder Model of Ultracold Fermions

The recent successes in coupling ultracold gases to synthetic gauge potentials show the exceptional possibilities of such setups in studying and probing many-body quantum physics. In this talk I will review some aspects of the theory of topological phases of matter and I will describe how synthetic magnetic fields and spin-orbit couplings allow us to simulate topological insulators and superconductors in optical lattices. I will focus in particular on a ladder model of fermions which mimics a one-dimensional topological superconductor and presents fractionalized edge modes. The physical observables suitable for the detection of topological phases in this system will be examined and I will discuss their robustness in the presence of Hubbard interactions.

Kontakt: D. Fioretto

Juni  2015
Mo
01.06.2015
Sitzungszimmer Mathematik
Theoretische Physik
14:15
Born-Hilbert-Seminar

D. Buchholz
Göttingen

Macroscopic aspects of the Unruh effect: On the heat of acceleration

Within the framework of quantum field theory, macroscopic concepts pertaining to the Unruh effect are introduced and used in order to clarify its physical manifestations. It is explained why, contrary to the conventional doctrine, an accelerated observer in an inertial vacuum state will not be immersed in a "gas of thermal quanta" even though his thermometer indicates a non-zero temperature.

Kontakt: K.-H. Rehren
Mo
08.06.2015
Seminarraum A.04.101
Theoretische Physik
14:15
Quantenfeldtheorie (Forschungsseminar M.Phy.412)

Luca Giorgetti
Göttingen

TBA



Kontakt: K.-H. Rehren
Do
11.06.2015
Sitzungssaal Mathematik
Theoretische Physik
15:15
Graduiertenkolleg 1493

Nigel Higson
Penn State University

TBA



Kontakt: K.-H. Rehren
Do
11.06.2015
Sitzungssaal Mathematik
Theoretische Physik
15:15
Graduiertenkolleg 1493

Fathi Ben Aribi
Paris

Knoten und Torsion



Kontakt: K.-H. Rehren
Mo
15.06.2015
SR4 oder Sitzungszimmer Mathematik
Theoretische Physik
14:15
Born-Hilbert-Seminar

Jens Mund
Juiz de Fora / Göttingen

String-localized quantum fields



Kontakt: K.-H. Rehren
Mo
22.06.2015
Seminarraum A.04.101
Theoretische Physik
14:15
Quantenfeldtheorie (Forschungsseminar M.Phy.412)

Tobias Binder
Göttingen

TBA



Kontakt: K.-H. Rehren
Di
23.06.2015
Seminarraum A3.101
Theoretische Physik
14:15
Theoretisch-physikalisches Seminar

Pietro Silvi
University of Ulm

TBA



Kontakt: D. Fioretto
Di
23.06.2015
SR 3, Institut für Theoretische Physik, A03.101
SFB 937
17:00
Seminar

Tilman Schäffer
Universität Tübingen

TBA



Mo
29.06.2015
SR4 oder Sitzungszimmer Mathematik
Theoretische Physik
14:15



Kontakt: K.-H. Rehren

Juli  2015
Mo
06.07.2015
Seminarraum A.04.101
Theoretische Physik
14:15
Quantenfeldtheorie (Forschungsseminar M.Phy.412)

Lucas Schmidt, Franz Kaiser
Göttingen

TBA



Kontakt: K.-H. Rehren
Di
07.07.2015
Seminarraum A3.101
Theoretische Physik
14:15
Theoretisch-physikalisches Seminar

Matthias Kaminski
University of Alabama

TBA



Kontakt: S. Kehrein
Do
09.07.2015
Sitzungssaal Mathematik
Theoretische Physik
15:15
Graduiertenkolleg 1493

Christian Becker
Uni Potsdam

TBA



Kontakt: K.-H. Rehren
Mo
13.07.2015
SR4 oder Sitzungszimmer Mathematik
Theoretische Physik
14:15



Kontakt: K.-H. Rehren

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Last modified: Tue May 3 13:27:47 CEST 2011