Journal article
Enhancement of nearest-neighbor entanglement in one-dimensional disordered systems
Publication Details
Authors: | Lopez-Sandoval, R.; Garcia, M. |
Publisher: | AMERICAN PHYSICAL SOC |
Publication year: | 2006 |
Journal: | Physical Review B |
Pages range : | 174204 |
Journal acronym: | Phys. Rev. |
Volume number: | 74 |
Number of pages: | 8 |
ISSN: | 1098-0121 |
DOI-Link der Erstveröffentlichung: |
Abstract
The pairwise quantum entanglement between sites in disordered electronic one-dimensional systems (rings) is studied. We focus on the effect of diagonal and off-diagonal disorder on the ground-state concurrence C-ij between neighboring and not neighboring sites i,j as a function of electron band filling. In the case of diagonal disorder, increasing the degree of disorder leads to a decrease of the concurrence with respect to the ordered case. However, off-diagonal disorder causes a surprisingly strong enhancement of nearest-neighbor entanglement. This remarkable effect occurs near half filling, where the concurrence becomes up to 15% larger than in the periodic system.
The pairwise quantum entanglement between sites in disordered electronic one-dimensional systems (rings) is studied. We focus on the effect of diagonal and off-diagonal disorder on the ground-state concurrence C-ij between neighboring and not neighboring sites i,j as a function of electron band filling. In the case of diagonal disorder, increasing the degree of disorder leads to a decrease of the concurrence with respect to the ordered case. However, off-diagonal disorder causes a surprisingly strong enhancement of nearest-neighbor entanglement. This remarkable effect occurs near half filling, where the concurrence becomes up to 15% larger than in the periodic system.
