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Título: | Interplay between spin frustration and thermal entanglement in the exactly solved Ising-Heisenberg tetrahedral chain |
Palavras-chave: | Frustration temperature Thermal entanglement Threshold temperature Ising-Heisenberg chain |
Data do documento: | 3-Mai-2013 |
Editor: | Elsevier |
Citação: | ROJAS, O.; STREČKA, J.; LYRA, M. L. Interplay between spin frustration and thermal entanglement in the exactly solved Ising-Heisenberg tetrahedral chain. Physics Letters A, [S.l.], v. 377, n. 12, p. 920-926, May 2013. DOI: 10.1016/j.physleta.2013.02.013. |
Resumo: | The spin-1/2 Ising–Heisenberg tetrahedral chain is exactly solved using its local gauge symmetry (the total spin of the Heisenberg bonds is locally conserved) and the transfer-matrix approach. Exact results derived for spin–spin correlation functions are employed to obtain the frustration temperature. In addition, we have exactly calculated a concurrence quantifying thermal entanglement. It is shown that the frustration and threshold temperature coincide at sufficiently low temperatures, while they exhibit a very different behavior in the high-temperature region when tending towards completely different asymptotic limits. The threshold temperature additionally shows a notable reentrant behavior when it extends over a narrow temperature region above the classical ground state without any quantum correlations. |
URI: | https://www.sciencedirect.com/science/article/abs/pii/S0375960113001539 http://repositorio.ufla.br/jspui/handle/1/45511 |
Aparece nas coleções: | DFI - Artigos publicados em periódicos |
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