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The Approach to Equilibration in Closed Quantum Systems / Equilibrierung von abgeschlossenen QuantensystemenNiemeyer, Hendrik 03 July 2014 (has links)
The question whether and how closed quantum systems equilibrate is still debated today.
In this thesis a generic spin system is analysed and criteria to classify unique equilibration
dynamics are developed. Furthermore, the eigenstate thermalization hypothesis is
investigated as a possible cause for the unique equilibrium. For both problems novel
numerical methods for solving the time-dependent Schroedinger equation based on series
expansions and typicality are developed. Furthermore, the problem of markovian
dynamics on the level of single measurements is discussed.
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Phase diagrams of two-dimensional frustrated spin systems / Phasendiagramme für zweidimensionale frustrierte SpinsystemeKalz, Ansgar 22 March 2012 (has links)
No description available.
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