Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 8: Statistical Physics far from Thermal Equilibrium

DY 8.10: Vortrag

Montag, 20. März 2017, 17:30–17:45, ZEU 118

Manipulating decoherence and relexation by adding non-commuting noise — •Timo Palm^1,2 and Peter Nalbach¹ — ¹Westfälische Hocheschule ,Münsterstr. 265 , 46397 Bocholt — ²I. Institut für Theoretische Physik Universität Hamburg Jungiusstraße 9 20355 Hamburg

In recent years the role of coherence in quantum systems has been a field of increasing interests, with applications reaching from quantum dots and quantum computers to solar cell efficiency and the possible use of such mechanisms in artificial light-harvesting complexes. Interaction of such quantum system with environments typically destroys coherence and yields relaxation, with larger coupling strengths to the environment resulting in faster relaxation/decoherence. We show that the relaxation rates can significantly be reduced by adding environmental fluctuations, which couple via non-commuting system bath operators. As a toy model the two level system is studied, its dynamics is simulated via an extended version of the quasi adiabatic path integral and a perturbative theory (RESPET).