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Global entanglement in ground state of {Cu3} single-molecular magnet with magnetic field |
| Li Ji-Qiang (李纪强), Zhou Bin (周斌) |
| Department of Physics, Hubei University, Wuhan 430062, China |
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Abstract We investigate global entanglement in the ground state of single-molecular magnet Na9[Cu3Na3(H2 O)9(α -AsW9O33)2]· 26H2O with an external magnetic field. The concurrence, tangle, and measure function Q, which characterize the pairwise entanglement, 3-party entanglement and total entanglement, respectively, are calculated numerically at zero temperature. The results show that the magnitude and direction of the applied magnetic field play a significant role in the properties of three kinds of entanglement measures. We give a physical interpretation of the variation of the global entanglement with the magnetic field. Finally, the phase diagram of the global entanglement characterized by the critical magnetic fields is presented.
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Received: 19 February 2014
Revised: 21 March 2014
Accepted manuscript online:
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PACS:
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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75.50.Xx
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(Molecular magnets)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11274102), the Program for New Century Excellent Talents in Universities, China (Grant No. NCET-11-0960), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20134208110001). |
Corresponding Authors:
Zhou Bin
E-mail: binzhou@hubu.edu.cn
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| About author: 03.65.Ud; 03.67.Mn; 75.10.Jm; 75.50.Xx |
Cite this article:
Li Ji-Qiang (李纪强), Zhou Bin (周斌) Global entanglement in ground state of {Cu3} single-molecular magnet with magnetic field 2014 Chin. Phys. B 23 070302
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