Volume 87, Number 4, August 2009
|Number of page(s)||5|
|Published online||15 September 2009|
Entanglement temperature in molecular magnets composed of -spin dimers
Instituto de Física de São Carlos, Universidade de São Paulo - P.O. Box 369, 13560-970, São Carlos, SP, Brazil
2 Centro Brasileiro de Pesquisas Físicas - Rua Dr. Xavier Sigaud 150, 22290-180, Rio de Janeiro, Brazil
3 Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo Waterloo, Ontario, N2L 3G1, Canada
4 CICECO, Universidade de Aveiro - 3810-193, Aveiro, Portugal, EU
5 Departamento de Química, Universidade de Aveiro - 3810-193 Aveiro, Portugal, EU
6 NSSD, ORNL - Oak Ridge, TN 37831-6475, USA
Corresponding author: email@example.com
Accepted: 17 August 2009
In the present work, we investigate the quantum thermal entanglement in molecular magnets composed of dimers of spin S, using an Entanglement Witness built from measurements of magnetic susceptibility. An entanglement temperature, Te, is then obtained for some values of spin S. From this, it is shown that Te is proportional to the intradimer exchange interaction J and that entanglement appears only for antiferromagnetic coupling. The results are compared to experiments carried on three isostructural materials: (M=Mn, Fe or Cu).
PACS: 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 75.50.Xx – Molecular magnets / 03.67.Bg – Entanglement production and manipulation
© EPLA, 2009
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