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Institute for Theoretical Physics
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| April 2012 | |
| Wed |
04/04/12
Seminarraum 4 (A4.101)
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| 14:15 |
Theoretisch-physikalisches Seminar
Karla Türschmann Universität Erlangen
Effects of commensuration and magnetic field in graphene multilayers Kontakt: Tretyakov |
| Mon |
16/04/12
Sitzungszimmer Mathematik
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| 14:15 |
Kontakt: K.-H. Rehren |
| Tue |
17/04/12
Seminarraum A3.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Martin Weigt Universite Pierre et Marie Curie, Paris
From the statistical physics of inverse problems to the structural inference of proteins Kontakt: Prof. A. Zippelius |
| Wed |
18/04/12
Seminarraum A3.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Pascal Wieland Universität Stuttgart
Numerische Simulationen auf Raum-Zeit-Gittern zum makroskopischen Quantentunneln bei Bose-Einstein-Kondensaten mit attraktiver 1/r-Wechselwirkung |
| Thu |
19/04/12
Sitzungssaal Mathematik
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| 15:15 |
Kontakt: K.-H. Rehren |
| Mon |
23/04/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
alle Teilnehmer Semesterplanung Kontakt: K.-H. Rehren |
| Tue |
24/04/12
Seminarraum A 03.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Horacio Castillo Ohio University
Fluctuations in the relaxation of glasses Glass transitions are associated with a rapid increase of the relaxation time in a system as a function of an external parameter, usually temperature or volume fraction. When the relaxation time becomes longer than the typical experimental timescale, phenomena associated with the absence of thermodynamic equilibrium start to become evident. In the regime near the glass transition, materials exhibit "dynamical heterogeneity", i.e., the presence of correlated fluctuations in the dynamical behavior of small regions of the system, whose origin is still poorly understood. One possible theoretical approach to explain the origin of these fluctuations involves the presence of local fluctuations in the time variables. This picture can be also seen to emerge from a simple phenomenological description of dynamical heterogeneity in terms of fluctuating local relaxation times. I will present Molecular Dynamics simulation results characterizing the statistical properties of the fluctuations in models of structural glasses, both in equilibrium and out of equilibrium. These results exhibit evidence for the presence of universality, scaling behavior, and a dynamic correlation length that grows as the system relaxes; and they are consistent with a description of dynamical heterogeneity in terms of fluctuations of the time variables. |
| Wed |
25/04/12
Seminarraum A3.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Giovanni Marelli Universität Göttingen, SFB 803
Minimalistic models for lipid membranes: local and long range modification around membran's defects |
| Mon |
30/04/12
SR3
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| 14:15 |
Kontakt: K.-H. Rehren |
| Mon |
30/04/12
SR4
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| 16:00 |
Graduiertenkolleg 1493
Henrik Seppänen Paderborn / Göttingen
Asymtotics of multiplicities and geometric quantization Kontakt: K.-H. Rehren |
| May 2012 | |
| Thu |
03/05/12
Sitzungssaal Mathematik
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| 15:15 |
Kontakt: K.-H. Rehren |
| Mon |
07/05/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Yoh Tanimoto Göttingen
On KMS states in chiral conformal QFT We consider thermal states on one-dimensional conformal theories. In our previous work, we showed that completely rational nets admit only one KMS state at each temperature. Here the subject is non rational nets. We construct and completely classify KMS states on U(1)-current net and the Virasoro net with c=1. We explain how nontrivial KMS states could lead to new Moebius covariant nets. Kontakt: K.-H. Rehren |
| Wed |
09/05/12
Seminarraum A 03.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Daniel Herde MPIDS, Göttingen
Contact line dynamics on heterogeneous substrates Kontakt: Marcus Müller |
| Wed |
09/05/12
Seminarraum A 03.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Andre Galuschko Institut für Theoretische Physik
to be announced Kontakt: Marcus Müller |
| Fri |
11/05/12
Mathematisches Institut, HS 1
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| 16:15 |
Sonderveranstaltung
Stanislaw Woronowicz Warschau, Göttingen
Quasitriangular Quantum Groups and Braided Categories of C*-algebras Kontakt: K.-H. Rehren |
| Mon |
14/05/12
Sitzungszimmer Mathematik
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| 14:15 |
Born-Hilbert-Seminar
Jürg Fröhlich ETH Zürich
Mathematische Aspekte der Quantentheorie - "Skizze eines Programms" Ich werde grundlegende Bemerkungen zur Nicht-Voraussagbarkeit der Zukunft in relativistischen Theorien und zum Indeterminismus der Quantentheorie machen. Anschliessend werde ich einen einheitlichen Formalismus zur Beschreibung klassischer und quantenmechanischer physikalischer Systeme skizzieren und die radikalen Unterschiede zwischen klassischer und Quantenphysik andeuten. Schliesslich soll dargelegt werden, wie die Geometrie der Raum-Zeit in der Quantentheorie erscheint. Kontakt: K.-H. Rehren |
| Mon |
14/05/12
Seminarraum A4.101
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| 15:00 |
Aktuelle Probleme der theoretischen Festkörperphysik
(Forschungsseminar M.Phy.411)
Dr. Andreas Sinner Institut für Physik, Universität Augsburg
Geaenderte Anfangszeit Aspects of asymptotic freedom in condensed matter systems Ich moechte in diesem Vortrag einen Umriss ueber einige Forschungsprojekte geben, an denen ich in den letzten Jahren beteiligt war. Die Modelle, die wir studieren, moegen sehr verschieden vorkommen, dennoch haben sie eine Gemeinsamkeit, naemlich das asymptotische Streben des Wechselwirkungskopplungsparameters gegen Null im Infraroten. Ich diskutiere die daraus folgenden Konsequenzen fuer die theoretische Beschreibung der Physik dieser Modelle Kontakt: Stefan Kehrein |
| Tue |
15/05/12
Seminarraum A3.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Martin Trulsson ESPCI Paris
Rheology of dense suspensions and granular flows close to jamming |
| Wed |
16/05/12
Seminarraum A 03.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Murat Mülayim Institut für Theoretische Physik
to be announced Kontakt: Marcus Müller |
| Mon |
21/05/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Dirk Rathlev Göttingen
(Stability in Supergravity Theories) Kontakt: K.-H. Rehren |
| Tue |
22/05/12
Seminarraum A 03.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Sabine Klapp TU Berlin
Dynamics of ferrofluids in external fields: Chaining, layering, and anomalous diffusion In colloidal suspensions, self-assembly and self-organization processes can be easily fueled by external fields. Here we discuss recent computer simulation and theoretical results for the dynamical behavior of suspensions of ferromagnetic particles under the influence of (static and time-dependent) magnetic fields. In the first part we discuss the translational diffusion in static fields, where the particles tend to aggregate into chains. We show that the anisotropic, yet normal diffusive behavior seen in weakly coupled systems and finite fields can become anomalous both parallel and perpendicular to the field at sufficiently large coupling strengths. The second part focusses on the impact of rotating fields. Here one observes both synchronized states, where the individual particles follow the field with (on average) constant phase difference, and asynchronous states. Depending on the spatial dimension, the synchronization is accompanied by layer formation, i.e. by spatial symmetry-breaking, or by a clustering process.Our suggest that these pattern formation phenomena can be understood, at least partially, as by-products of an equilibrium phase transition. Kontakt: A. Zippelius |
| Tue |
22/05/12
Seminarraum A4.101
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| 16:00 |
Aktuelle Probleme der theoretischen Festkörperphysik
(Forschungsseminar M.Phy.411)
Gennady Y. Chitov Department of Physics, Laurentian University, Sudbury (Canada)
Sonderveranstaltung - SFB 602 On the Unifying Properties of the Spin-SAF and Other Peierls-type Phase Transitions We first review the theory of the spin-SAF transition in a spin-pseudospin model comprised of the frustrated quantum Ising model for pseudospins, representing the charge degrees of freedom, coupled to the Heisenberg spin chains. The model is known to undergo a phase transition with the simultaneous appearance super-antiferroelectric (SAF) pseudospin long-range order and a spin gap (spin-SAF transition). We will stress the similarities between the spin-SAF and other Peierls-type phase transitions. In particular, we will analyze the BCS ratio and show that it gets renormalized from the classical free-fermionic value. The BCS-ratio value is universal in the sense that is does not depend on the microscopic parameters of the model, and must be the same for various types of the Peierls-like transitions where the spin gap is accompanied by the structural, orbital or charge order. Kontakt: Ansgar Kalz |
| Wed |
23/05/12
Seminarraum A 03.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Ulrich Welling Institut für Theoretische Physik
Influence of electric fields on the self-assembly of block copolymers in confined geometries Kontakt: Marcus Müller |
| Thu |
24/05/12
Sitzungssaal Mathematik
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| 15:15 |
Questions hour (14:15): Introduction to modern measurement theory and Ozawa's new formulation of the uncertainty relation Kontakt: K.-H. Rehren |
| Fri |
25/05/12
SR4, A04.101
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| 10:00 |
Sonderveranstaltung
Boaz Pokroy Russell Berrie Nanotechnology Institute
Adsorption of SAMs on liquid metals with dynamically expanding surfaces Kontakt: K.-H. Rehren |
| Tue |
29/05/12
Seminarraum A3.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Dr. Spyros Sotiriadis (SISSA, Trieste)
On the initial states after a quantum quench in an integrable Motivated by the study of quantum quenches in integrable field theories (IFTs) and in particular the structure of the initial state after such a quench, we are led to the investigation of transformations of the Zamolodchikov-Faddeev operators that respect their algebra. After showing that, unlike in free theories, linear transformations (Bogoliubov transformations) do not satisfy this condition, we explore simple cases of infinitesimal transformations that do so and study their properties. Examples from typical IFTs like the Sinh-Gordon and Lieb-Liniger models are presented, emphasizing the possibility to study quantum quenches. Kontakt: Stefan Kehrein |
| Wed |
30/05/12
Seminarraum A 03.101
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| 14:15 |
Statistische Mechanik komplexer Systeme (Forschungsseminar M.Phy.410)
Nikita Tretyakov Institut für Theoretische Physik
Correlation between surface topology and slip: a molecular dynamics study Kontakt: Marcus Müller |
| June 2012 | |
| Mon |
04/06/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Gennaro Tedesco Göttingen
Multilocal Fermionization Kontakt: K.-H. Rehren |
| Mon |
04/06/12
Seminarraum A4.101
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| 15:00 |
Aktuelle Probleme der theoretischen Festkörperphysik
(Forschungsseminar M.Phy.411)
Dr. Pier Paolo Baruselli ICTP Trieste, Italien
Kondo anomalies form first principles Kontakt: Thomas Pruschke |
| Tue |
05/06/12
Seminarraum A3.101
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| 14:15 |
Theoretisch-physikalisches Seminar
Prof. Raymond Fresard Laboratoire Crismat-ENSICAEN, Caen (F)
The Hubbard model in the singlet subspace: a symmetry-entangled mean-field approach Kontakt: Thomas Pruschke |
| Mon |
11/06/12
SR3 A.3.101
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| 14:15 |
Kontakt: K.-H. Rehren |
| Mon |
18/06/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Lena Wallenhorst Göttingen
(Conformal partial wave analysis) Kontakt: K.-H. Rehren |
| Thu |
28/06/12
Sitzungssaal Mathematik
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| 15:15 |
Kontakt: K.-H. Rehren |
| July 2012 | |
| Mon |
02/07/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Jens Mund Juiz de Fora
TBA Kontakt: K.-H. Rehren |
| Mon |
16/07/12
Seminarraum A.03.101
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| 14:15 |
Quantenfeldtheorie (Forschungsseminar M.Phy.412)
Julien Queva Göttingen
(Conformal Field Theory on conformally flat spacetimes) Kontakt: K.-H. Rehren |