Analytical results for entanglement in the five-qubit anisotropic Heisenberg model
arXiv:quant-ph/0407243 · doi:10.1016/j.physleta.2004.07.041
Abstract
We solve the eigenvalue problem of the five-qubit anisotropic Heisenberg model, without use of Bethe's Ansatz, and give analytical results for entanglement and mixedness of two nearest-neighbor qubits. The entanglement takes its maximum at Delta= (Delta>1) for the case of zero (finite) temperature with Delta being the anisotropic parameter. In contrast, the mixedness takes its minimum at Delta=1 (Delta>1) for the case of zero (finite) temperature.
Four pages, three figures
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