Control of open quantum systems [Elektronische Ressource] : a theoretical approach to control of surface photochemistry / von Erik Asplund

Control of Open Quantum Systems:A Theoretical Approach toControl of Surface PhotochemistryVon der Fakult¨at f¨ur Mathematik und Naturwissenschaftender Carl von Ossietzky Universit¨at Oldenburgzur Erlangung des Grades und Titels einesDoktors der Naturwissenschaften (Dr. rer. nat.)angenommene DissertationvonHerrn Erik Asplundgeboren am 09.01.1979 in Nyn¨ashamnOldenburg 2011Erstgutachter: Prof. Dr. T. Klu¨nerZweitgutachter: Prof. Dr. M. HolthausTag der Disputation: 28. M¨arz 2011To my wifeErwin kann mit seinem psikalkulieren wie noch nie.Doch wird jeder leicht einsehen,psi l¨aßt sich nicht recht verstehen.Erich Armand Arthur Joseph Hu¨ckelviiAbstractThe topic of this thesis was the control of open quantum systems with the emphasison the control of surface photochemical reactions. An open quantum system is aquantum system which interacts with its surroundings. A quantum system in con-densed phase, which undergoes strong dissipative processes, is an open quantumsystem. The last decades have seen both experimental and theoretical approachesfor gaining control over dissipative processes. From the theoretical viewpoint, it isimportant to model such processes in a rigorous way.In this thesis, the description of open quantum systems was realized withinthe “Surrogate Hamiltonian” approach. If systems, for which excitation and deex-citation processes have comparable time-scales, are investigated, a non-Markovianapproach should be employed.