Entanglement in spin-1 Heisenberg <Emphasis Type="Italic">XY</Emphasis> chain |
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| Authors: | Meng Qin YingJuan Tao MingLiang Hu DongPing Tian |
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| Institution: | (1) School of Science, Xi’an Jiaotong University, Xi’an, 710049, China;(2) Xi’an Institute of Post and Telecommunications, Xi’an, 710061, China |
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| Abstract: | We investigated the quantum entanglement in spin-1 Heisenberg XY chain for two-spin-qutrit and multi-particle systems. As a measure of the entanglement, the negativity of this state was
analyzed as a function of the temperature and the magnetic field. We gave some numerical results and discussed them in detail.
We found that the negativity increases monotonously with the coupling constants |J
1| and |J
2|, and it showed a symmetry with respect to the point of J
1 = 0 and J
2 = 0. In addition to the above features, there is evidence that the critical temperature is independent of the length of the
chain. |
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| Keywords: | Heisenberg chain bipartite entanglement negativity |
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