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Café com Física |
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26/07/2012
16:30 hrs F-210 Jesko Sirker University Kaiserslautern Dephasing, relaxation and thermalization in one-dimensional quantum models (.pdf) I will consider non-equilibrium dynamics in a one-dimensional Hubbard model and in a toy model for particle injection into a chain. The properties of such systems can be calculated numerically by time-dependent density matrix renormalization group (DMRG) methods. According to the Lieb-Robinson bound, information spreads with a finite velocity giving rise to an effective light cone. In my talk I will show how this light cone structure can be used to set up a very efficient DMRG algorithm. With the help of the DMRG data and analytical results for non-interacting cases I will discuss the differences between dephasing and relaxation as well as a possible thermalization in the long-time limit. 
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