Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 31: Quantum dynamics, decoherence and quantum information

DY 31.3: Vortrag

Freitag, 29. Februar 2008, 10:45–11:00, MA 004

Relaxation properties of Quantum Cellular Automata — •Alexander Kettler and Günter Mahler — Universität Stuttgart, 1. Institut für Theoretische Physik, Pfaffenwaldring 57, 70550 Stuttgart

In the recent years, much research has been done on the thermodynamical behaviour of small quantum systems [1]. Amongst others there have been investigations on the relaxation into (thermal) equilibrium states and on the effect of (classical) control on the thermodynamic properties of such small quantum systems. With this in mind, we have dealt with the question of using the formalism of Quantum Cellular Automata (QCA) to control the relaxational behaviour of closed quantum systems. Here we show the effect of several different rules for two different types of QCA, applied to a 1-dimensional spin-chain and how QCA-dynamics itself can produce relaxational behaviour.

[1] J. Gemmer, M.Michel and G.Mahler: Quantum Thermodynamics, Springer 2004