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- W1567194914 abstract "By using the concept of the quantum discord (QD), we study the spin-1/2 antiferromagnetic Heisenberg chain with next-nearest-neighbor interaction. Due to the $SU(2)$ symmetry and $Z_{2}$ symmetry in this system, we obtain the analytical result of the QD and its geometric measure (GMQD), which is determined by the two-site correlators. For the 4-site and 6-site cases, the connection between GMQD (QD) and the eigenenergies was revealed. From the analytical and numerical results, we find GMQD (QD) is an effective tool in detecting the both the first-order and the infinite-order quantum-phase-transition points for the finite-size systems. Moreover, by using the entanglement excitation energy and a universal frustration measure we consider the frustration properties of the system and find a nonlinear dependence of the GMQD on the frustration." @default.
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- W1567194914 date "2013-05-01" @default.
- W1567194914 modified "2023-09-27" @default.
- W1567194914 title "Quantum discord and quantum phase transition in spin-1/2 frustrated Heisenberg chain" @default.
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- W1567194914 doi "https://doi.org/10.26421/qic13.5-6-6" @default.
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