Experimental observation of quantum entanglement in low dimensional spin systems
Strongly Correlated Electrons
2008-09-20 v2 Statistical Mechanics
Quantum Physics
Abstract
We report macroscopic magnetic measurements carried out in order to detect and characterize field-induced quantum entanglement in low dimensional spin systems. We analyze the pyroborate MgMnB_2O_5 and the and the warwickite MgTiOBO_3, systems with spin 5/2 and 1/2 respectively. By using the magnetic susceptibility as an entanglement witness we are able to quantify entanglement as a function of temperature and magnetic field. In addition, we experimentally distinguish for the first time a random singlet phase from a Griffiths phase. This analysis opens the possibility of a more detailed characterization of low dimensional materials.
Keywords
Cite
@article{arxiv.cond-mat/0608403,
title = {Experimental observation of quantum entanglement in low dimensional spin systems},
author = {T. G. Rappoport and L. Ghivelder and J. C. Fernandes and R. B. Guimaraes and M. A. Continentino},
journal= {arXiv preprint arXiv:cond-mat/0608403},
year = {2008}
}