Quantum entanglement in trimer spin-1/2 Heisenberg chains with antiferromagnetic coupling
Abstract
The quantum entanglement measure is determined, for the first time, for antiferromagnetic trimer spin-1/2 Heisenberg chains. The physical quantity proposed to measure the entanglement is the distance between states by adopting the Hilbert-Schmidt norm. The method is applied to the new magnetic Cu(II) trimer system, 2b.3CuCl_2.2H_2O, and to the trinuclear Cu(II) halide salt, (3MAP)_2Cu_2Cl_8. The decoherence temperature, above which the entanglement is suppressed, is determined for the both systems. A correlation among their decoherence temperatures and their respective exchange coupling constants is established.
Keywords
Cite
@article{arxiv.1502.07000,
title = {Quantum entanglement in trimer spin-1/2 Heisenberg chains with antiferromagnetic coupling},
author = {O. M. Del Cima and D. H. T. Franco and S. L. L. da Silva},
journal= {arXiv preprint arXiv:1502.07000},
year = {2015}
}
Comments
4 pages, 3 figures, two references were added, [9](S. Sahling et al., Nature Physics 11 (2015) 255) and [19](G. Toth, Phys.Rev.A 69 (2004) 052327)