TY  - JOUR
AU  - Steinigeweg, R.
AU  - Jin, F.
AU  - De Raedt, H.
AU  - Michielsen, K.
AU  - Gemmer, J.
TI  - Charge diffusion in the one-dimensional Hubbard model
JO  - Physical review / E
VL  - 96
IS  - 2
SN  - 2470-0045
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2017-06723
SP  - 020105
PY  - 2017
AB  - We study the real-time and real-space dynamics of charge in the one-dimensional Hubbard model in the limit of high temperatures. To this end, we prepare pure initial states with sharply peaked density profiles and calculate the time evolution of these nonequilibrium states, by using numerical forward-propagation approaches to chains as long as 20 sites. For a class of typical states, we find excellent agreement with linear-response theory and unveil the existence of remarkably clean charge diffusion in the regime of strong particle-particle interactions. We additionally demonstrate that, in the half-filling sector, this diffusive behavior does not depend on certain details of our initial conditions, i.e., it occurs for five different realizations with random and nonrandom internal degrees of freedom, single and double occupation of the central site, and displacement of spin-up and spin-down particles.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000408513700002
C6  - pmid:28950562
DO  - DOI:10.1103/PhysRevE.96.020105
UR  - https://juser.fz-juelich.de/record/837962
ER  -