Quantum entanglement in trimer spin-1/2 Heisenberg chains with antiferromagnetic coupling

Autor:	Del Cima, O. M., Franco, D. H. T., da Silva, S. L. L.
Rok vydání:	2015
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	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. Comment: 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)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1502.07000 Zobrazit plný text záznamu View this record from Arxiv