Issue
EPL
Volume 84, Number 6, December 2008
Article Number 60003
Number of page(s) 4
Section General
DOI http://dx.doi.org/10.1209/0295-5075/84/60003
Published online 12 January 2009
EPL, 84 (2008) 60003
DOI: 10.1209/0295-5075/84/60003

Experimental investigation of the entanglement in the magnetization of the layered CaMn2Sb2 compound

A. L. Lima Sharma1, 2 and A. M. Gomes3

1   Magnetic Material Laboratory, RIKEN - 2-1 Hirosawa, Wako-shi, Saitama, Japan
2   Department of Physics, Tuskegee University - Tuskegee, AL, 36088 USA
3   Instituto de Fisica, Universidade Federal do Rio de Janeiro - C.P. 68528, RJ 21941-972, Brazil

lima.sharma@gmail.com

received 17 July 2008; accepted in final form 18 November 2008; published December 2008
published online 12 January 2009

Abstract
In this letter, we present an experimental observation of entanglement in a spin chain formed in the layered compound CaMn2Sb2. The presence of entanglement was investigated through a measurable quantity, the magnetic susceptibility. The entanglement witness obtained from the measurement is presented as a function of applied field for fixed temperatures. The presence of entanglement is observed even for reasonably high temperatures and applied fields. Since entanglement seems to occur naturally in this material, we suggest it to be used as an entanglement reservoir.

PACS
03.67.Mn - Entanglement measures, witnesses, and other characterizations.
75.30.Gw - Magnetic anisotropy.
75.50.Ee - Antiferromagnetic.

© EPLA 2008