Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):
R. Achleitner:
"Quantum Monte Carlo-Stochastic Series Expansion; from coding to the simulation of NMR spectra";
Vortrag: Seminar Institut für Allgemeine Physik (IAP),
TU Wien, Institut für Angewandte Physik;
04.12.2012.
Kurzfassung englisch:
SrCu2O3 is a spin-1/2 Heisenberg spin-ladder compound that has been studied intensely both experimentally and theoretically. However, the low temperature broadening of the NMR spectrum caused by a small impurity concentrations (x < 0.005) could not be explained satisfactorily.
During my talk I will describe how such a system can be modeled and simulated using "Quantum Monte Carlo" (QMC) in the framework of the "Stochastic Series Expansion" (SSE). A brief introduction about the Monte Carlo Method in general will provide a basic understanding of this powerful tool. After discussing the stochastic series expansion the algorithm applied to the spin-1/2 Heisenberg model will be presented. In the last part of the talk I will show results obtained with our QMC-SSE code as well as a semi empirical model obtained from these results.
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.