Entanglement of a Five-Qubit Heisenberg XX Chain in a Magnetic Field |
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| Authors: | CAO Min LING Yin-Sheng ZHU Shi-Qun |
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| Institution: | 1.School of Science, Nantong University, Nantong 226007, China
;2.School of Physical Science and Technology, Suzhou University, Suzhou 215006, China |
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| Abstract: | We calculate the eigenvalues and eigenvectors of a five-qubit isotropic Heisenberg model in an external magnetic field, and give analytical results for the concurrence of two nearest-neighbor qubits. A magnetic field can eliminate degeneration and change the ground state of the system. Therefore increasing the value of the magnetic field can induce entanglement in a certain range both for the antiferromagnetic and ferromagnetic case. |
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| Keywords: | entanglement five-qubit Heisenberg chain |
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