Dresden 2009 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 23: Statistical physics far from thermal equilibrium

DY 23.5: Vortrag

Donnerstag, 26. März 2009, 15:15–15:30, HÜL 386

Quantum Jarzynski estimator for boundary switching processes — •Jens Teifel and Günter Mahler — Universität Stuttgart, 1. Institut für Theoretische Physik, Germany

We consider the Jarzynski relation for a single particle inside a one-dimensional quantum well. We compare two types of processes: i) changing the width of the well and thus the boundary conditions (BSP), ii) changing the width of a potential step inside a fixed quantum well (QBSP). The latter can approximate BSP to any desired accuracy. While BSP violates the Jarzynski relation, QBSP does not. Simulations of measurement series on QBSP reveal limits on the practical applicability of the Jarzynski estimator for the free energy change.