Willkommen zum Oberseminar Mathematische Physik
im Wintersemester 2012/2013 von Prof. Dr. D. Dürr und Prof. Dr. P. Pickl
Bitte beachten Sie, dass unser Seminar vom 16. Januar 2013 an erst um 16.15h beginnt!
Vorträge
Termin |
Ort |
Titel |
Vortragender |
Mi 17.10.12, 16 st |
B101 |
Energie-Zeit-Unschärfe |
Nicola Vona & Robert Grummt |
Mi 24.10.12, 16 st |
B101 |
Random Graphs |
Andrej Nikonov |
Mi 31.10.12, 16 st |
B101 |
N-Teilchen Dirac Gleichung |
Martin Oelker |
Mi 07.11.12, 16 st |
B101 |
Fällt aus!!! |
|
Mi 14.11.12, 16 st |
B101 |
Fällt aus!!! |
|
Mi 21.11.12, 16 st |
B101 |
The Fermionic Quantum Marginal Problem and its Physical RelevanceThe problem of determining and describing the family of 1-particle reduced density operators (1-RDO) arising from N-fermion pure states (via partial trace) is known as the fermionic quantum marginal problem. We present its solution, a multitude of constraints on the eigenvalues of the 1-RDO, generalizing the Pauli exclusion principle. To explore the relevance of these constraints we study an analytically solvable model of N fermions in a harmonic potential and determine the spectral "trajectory" corresponding to the ground state as function of the fermion-fermion interaction strength. Intriguingly, we find that the occupation numbers are almost, but not exactly, pinned to the boundary of the allowed region (quasi-pinned). Our findings suggest a generalization of the Hartree-Fock approximation. |
Christian Schilling |
Mi 28.11.12, 16 st |
B101 |
Derivation of the Hartree-Fock Equation |
Sören Petrat |
Mi 05.12.12, 16:30 |
B101 |
Entropieverlauf des Universums |
Paula Reichert |
Mi 12.12.12, 16 st |
B101 |
Effective Dynamics of a Heavy Particle in the Dirac Sea |
Maximilian Jeblick |
Mi 19.12.12, 16 st |
B101 |
Ortsoperator für Photonen |
Nicolai Leopold |
Mi 09.01.13, 16 st |
B101 |
Arbeitsgruppenbesprechung für alle Doktoranden und Master Studenten der Gruppe Dürr/Pickl |
|
Mi 16.01.13, 16:15 |
B101 |
The Higgs Boson |
André Franca |
Mi 23.01.13, 16:15 |
B101 |
Scaling of the Potential in the Gross-Pitaevskii Equation |
Vytautas Matulevicius |
Mi 30.01.13, 16:15 |
B101 |
Fällt aus!!! |
|
Mi 06.02.13, 16:15 |
B101 |
Diffusive Bewegung fermionischer Teilchen im Dirac-See |
David Mitrouskas |
Mi 13.02.13, 16:15 |
B101 |
What's wrong with Quantum Gravity? |
Dustin Lazarovici |
Mi 06.03.13, 16:15 |
B101 |
Multi-Time Wave Functions for Relativistic Quantum Field TheoryIn non-relativistic quantum mechanics of N particles, the wave function psi(q_1,...,q_N,t) is a function of 3N position coordinates and one time coordinate. It is an obvious idea that in a relativistic setting, such functions should be replaced by phi(t_1,q_1,...,t_N,q_N), a function of N space-time points called a multi-time wave function. In quantum field theory (QFT), it is common to use the Heisenberg picture; but if we use the Schroedinger picture, and if we use the position representation, then the wave function at time t corresponds to a vector in Fock space and can be regarded as a function on the configuration space of a variable number of particles (the union of R^3N over N = 0 to infinity). The corresponding multi-time wave function phi is a function on the union of (R^4)^N over N = 0 to infinity. I discuss relevant evolution equations for phi corresponding to model QFTs, conditions for their consistency, the relation to the Tomonaga-Schwinger approach, and ways of implementing an ultraviolet regularization. This is joint work with Sören Petrat. |
Prof. Roderich Tumulka |
Do 21.03.13, 16:00 |
B349 |
Macromolecular Interference in Collapse Models |
Urs Waldmann |
Das Oberseminar wird im Sommersemester 2013 fortgesetzt (Link).
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