Entanglement temperature in molecular magnets composed of S-spin dimers

D. O. Soares-Pinto; A. M. Souza; R. S. Sarthour; I. S. Oliveira; M. S. Reis; P. Brandao; J. Rocha; A. M. dos Santos

doi:10.1209/0295-5075/87/40008

Entanglement temperature in molecular magnets composed of S-spin dimers

Quantum Physics 2011-07-01 v1

Authors: D. O. Soares-Pinto , A. M. Souza , R. S. Sarthour , I. S. Oliveira , M. S. Reis , P. Brandao , J. Rocha , A. M. dos Santos

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Abstract

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, $T_{e}$ , is then obtained for some values of spin $S$ . From this, it is shown that $T_{e}$ 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: KNaMSi $_{4}$ O $_{10}$ (M $=$ Mn, Fe or Cu).

Keywords

entanglement temperature molecular magnets spin dimers entanglement witness magnetic susceptibility antiferromagnetic coupling

Cite

@article{arxiv.0908.2838,
  title  = {Entanglement temperature in molecular magnets composed of S-spin dimers},
  author = {D. O. Soares-Pinto and A. M. Souza and R. S. Sarthour and I. S. Oliveira and M. S. Reis and P. Brandao and J. Rocha and A. M. dos Santos},
  journal= {arXiv preprint arXiv:0908.2838},
  year   = {2011}
}

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accepted for publication in EPL

Entanglement temperature in molecular magnets composed of S-spin dimers

Abstract

Keywords

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