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Impurity in Pairwise Entanglement of Heisenberg XX Open Chain |
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| Authors: | XI Xiao-Qiang CHEN Wen-Xue LIU Qi YUE Rui-Hong |
| Affiliation: | 1. Department of Applied Mathematics and Physics,Xi'an Institute of Posts and Telecommunications, Xi'an 710061, China;2. Joint Laboratory of Advanced Technology in Measurements,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, the Chinese Academy of Sciences, Beijing 100080, China;3. Institute of Modern Physics, North-West University, Xi'an 710069, China |
| Abstract: | We calculate the concurrence of all pairwise entanglement ofHeisenberg XX open chain with single system impurity in three-qubitand four-qubit cases, and find that the impurity parameter Ji hasgreat effect on pairwise entanglement. Choosing the proper parameterJi, we can obtain the maximal pairwise entanglement of thenearest qubits and make the non-nearest qubits entangle. |
| Keywords: | system impurity pairwise entanglement Heisenberg XX chain |
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