Monogamy and ground-state entanglement in highly connected systems
Quantum Physics
2009-11-13 v2 Other Condensed Matter
Abstract
We consider the ground-state entanglement in highly connected many-body systems, consisting of harmonic oscillators and spin-1/2 systems. Varying their degree of connectivity, we investigate the interplay between the enhancement of entanglement, due to connections, and its frustration, due to monogamy constraints. Remarkably, we see that in many situations the degree of entanglement in a highly connected system is essentially of the same order as in a low connected one. We also identify instances in which the entanglement decreases as the degree of connectivity increases.
Cite
@article{arxiv.quant-ph/0701009,
title = {Monogamy and ground-state entanglement in highly connected systems},
author = {Alessandro Ferraro and Artur Garcia-Saez and Antonio Acin},
journal= {arXiv preprint arXiv:quant-ph/0701009},
year = {2009}
}
Comments
7 pages, 11 figures. Considerably extended version, with new numerical and analytical results