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001     837948
005     20210129231449.0
024 7 _ |a 2128/15339
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037 _ _ |a FZJ-2017-06709
041 _ _ |a English
100 1 _ |a Steinigeweg, R
|0 P:(DE-HGF)0
|b 0
111 2 _ |a Big ideas in quantum matter
|c Nijmegen
|d 2017-09-14 - 2017-09-15
|w The Netherlands
245 _ _ |a Real-time broadening of nonequilibrium density profiles and the role of the specific initial-state realization
260 _ _ |c 2017
336 7 _ |a Conference Paper
|0 33
|2 EndNote
336 7 _ |a INPROCEEDINGS
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520 _ _ |a The real-time broadening of density profiles starting from nonequilibrium states is at the center of transportin condensed-matter systems and dynamics in ultracold atomic gases. Initial profiles close to equilibrium areexpected to evolve according to the linear response, e.g., as given by the current correlator evaluated exactly atequilibrium. Significantly off equilibrium, the linear response is expected to break down and even a description interms of canonical ensembles is questionable.We unveil that single pure states with density profiles of maximumamplitude yield a broadening in perfect agreement with the linear response, if the structure of these statesinvolves randomness in terms of decoherent off-diagonal density-matrix elements. While these states allow forspin diffusion in the XXZ spin-1/2 chain at large exchange anisotropies, coherences yield entirely differentbehavior.
536 _ _ |a 511 - Computational Science and Mathematical Methods (POF3-511)
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700 1 _ |a Jin, Fengping
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700 1 _ |a Schmidtke, D
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700 1 _ |a De Raedt, H
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700 1 _ |a Michielsen, Kristel
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700 1 _ |a Gemmer, J
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910 1 _ |a University of Osnabrück
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910 1 _ |a Forschungszentrum Jülich
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