Dresden 2006 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 20: Quantum Dynamics I

DY 20.3: Vortrag

Dienstag, 28. März 2006, 10:15–10:30, H\"UL 186

Thermal aspects of small spin systems — •Markus Henrich and Günter Mahler — 1. Institut für Theoretische Physik, Universität Stuttgart

With upcoming of nano-technologies there is more and more interest also in thermodynamic properties of nano- and mesoscopic systems. Numerically most accessible are small spin systems. These systems, when combined with appropriate baths, can show interesting thermal properties. Here we investigate spin systems with a Heisenberg interaction coupled to one or two baths under different local conditions. We show how these conditions influence the steady state of the spin system. In addition, for thermal equilibrium we compare different master-equation approaches with the exact Schroedinger-evolution [1].

[1] M. Henrich et al, "’Global and local relaxation of a spin-chain under exact Schroedinger and master equation dynamics"’, Phys. Rev. E 72, 026104 (2005)