Abstract
In a recent article in this journal Guo-Hui (Int. J. Theor. Phys. 56, 600, 2017) has investigated the quantum correlation properties in the two qubits one-axis spin squeezing model with an external magnetic field by means of concurrence (C) and quantum discord (QD) criteria. We are to reveal numerically and analytically that in the limiting case T→ 0 (ground state) the sudden disappearance phenomenon (SDP) does not occur in the behavior of C and the values obtained for C are incorrect.
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References
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Haddadi, S., Akhound, A. Thermal Entanglement Properties in Two Qubits One-Axis Spin Squeezing Model with an External Magnetic Field. Int J Theor Phys 58, 399–402 (2019). https://doi.org/10.1007/s10773-018-3941-x
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DOI: https://doi.org/10.1007/s10773-018-3941-x