Abstract
We have analyzed the behavior of multipartite global entanglement and average bipartite concurrence for the sign of quantum phase transitions in the frustrated J 1−J 2 model by using exact diagonalization technique for a chain of 12 qubits. It is found that although the magnitude of two classes of the measures show opposite trends the absolute value of their derivatives show similar structure near critical points.
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Eryiğit, R. Global Entanglement Measures and Quantum Phase Transitions in the 1D J 1−J 2 Model. Int J Theor Phys 48, 885–893 (2009). https://doi.org/10.1007/s10773-008-9861-4
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DOI: https://doi.org/10.1007/s10773-008-9861-4