Entanglement and level crossings in frustrated ferromagnetic rings
Abstract
We study the entanglement content of a class of mesoscopic tunable magnetic systems. The systems are closed finite spin-1/2 chains with ferromagnetic nearest-neighbor interactions frustrated by antiferromagnetic next-nearest-neighbor interactions. The finite chains display a series of level crossings reflecting the incommensurate physics of the corresponding infinite-size chain. We present dramatic entanglement signatures characterizing these unusual level crossings. We focus on multi-spin and global measures of entanglement rather than only one-spin or two-spin entanglements. We compare and contrast the information obtained from these measures to that obtained from traditional condensed matter measures such as correlation functions.
Keywords
Cite
@article{arxiv.0811.3419,
title = {Entanglement and level crossings in frustrated ferromagnetic rings},
author = {Masudul Haque and V. Ravi Chandra and Jayendra N. Bandyopadhyay},
journal= {arXiv preprint arXiv:0811.3419},
year = {2009}
}
Comments
6+ pages, 5 figures