Abstract
We investigate the effects of spatial inhomogeneities on the entanglement of modes of strongly correlated systems in the framework of small Fermi-Hubbard chains. We find regimes where entanglement is strongly enhanced by the presence of inhomogeneities. This contrasts with recent reports of entanglement destruction due to inhomogeneities. We further study this phenomenon using concepts of density functional theory and, thus, provide a general recipe for the prediction of entanglement enhancement in nanostructures. We find enhancement of up to , as compared to impurity-free chains.
- Received 14 September 2012
DOI:https://doi.org/10.1103/PhysRevA.87.032311
©2013 American Physical Society