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@INPROCEEDINGS{Steinigeweg:837948,
author = {Steinigeweg, R and Jin, Fengping and Schmidtke, D and De
Raedt, H and Michielsen, Kristel and Gemmer, J},
title = {{R}eal-time broadening of nonequilibrium density profiles
and the role of the specific initial-state realization},
reportid = {FZJ-2017-06709},
year = {2017},
abstract = {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.},
month = {Sep},
date = {2017-09-14},
organization = {Big ideas in quantum matter, Nijmegen
(The Netherlands), 14 Sep 2017 - 15 Sep
2017},
subtyp = {Other},
cin = {JSC},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/837948},
}