Entanglement entropy and the Berezinskii–Kosterlitz–Thouless phase transition in the J 1 – J 2 Heisenberg chain
作者： Yan-Chao Li , Yuan-Hui Zhu , Zi-Gang Yuan
DOI: 10.1016/J.PHYSLETA.2016.01.004
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摘要: Abstract Using the density matrix renormalization group (DMRG) technique, we study Berezinskii–Kosterlitz–Thouless (BKT) quantum phase transition (QPT) in J 1 – 2 Heisenberg chain model from entanglement point of view. It is found that gap behavior between two neighboring two-site entropies as well first derivative both entropy and block can be used indicators for BKT this model. The corresponding size dependent scaling behaviors are analyzed, respectively. Our numerical results give direct evidence effectiveness BKT-type QPT indicating different aspects.
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