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arXiv:0705.4413 · Physica B Condensed Matter

Entanglement in the 1D extended anisotropic Heisenberg model

Evgeny A. Plekhanov, Adolfo Avella, Francesco Paolo Mancini

Published Oct 25, 2007• 12 citations
arXivHTMLPDF
DOI
10.1016/j.physb.2007.10.127

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By using density matrix renormalization group technique we study the 1D extended anisotropic Heisenberg model.We find that starting from the ferromagnetic phase, the system undergoes two quantum phase transitions induced by frustration.By increasing the next-nearest-neighbor interaction, the ground state of the system changes smoothly from a completely polarized state to a next-nearest-neighbor correlated one.On the contrary, letting the in-plane interaction to be greater than the out-of-plane one, the ground state changes abruptly.

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By using density matrix renormalization group technique we study the 1D extended anisotropic Heisenberg model.We find that starting from the ferromagnetic phase, the system undergoes two quantum phase transitions induced by frustration.By increasing the next-nearest-neighbor interaction, the ground state of the system changes smoothly from a completely polarized state to a next-nearest-neighbor correlated one.On the contrary, letting the in-plane interaction to be greater than the out-of-plane one, the ground state changes abruptly.