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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.54: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Transport Phenomena in 1-D spin chains — •Pedro Vidal, Günter Mahler, and Mathias Michel — 1. Institut für Theoretische Physik, Universität Stuttgart

We study transport in a 1-D quantum spin chain by solving the Schrödinger equation. Because of the integrability of our models, and thus their conservation laws, we can analyse the system in a closed form in subspaces of our Hilbert space. Local quantities are defined via the coarse graining of our system and the No-dqdiffusionNo-dq behavior of these observables is calculated analyticaly or numerically, depending on the complexity of the sub-Hilbert space. We find evidence for a non experimental 1/t decay for the local coarse grained observables such as the local energy.