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|Title:||Bell nonlocality in conventional and topological quantum phase transitions|
|Authors:||Deng, D.-L. |
|Source:||Deng, D.-L., Wu, C., Chen, J.-L., Gu, S.-J., Yu, S., Oh, C.H. (2012-09-10). Bell nonlocality in conventional and topological quantum phase transitions. Physical Review A - Atomic, Molecular, and Optical Physics 86 (3) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.86.032305|
|Abstract:||We investigate the critical behaviors of the Bell nonlocality, which are measured by the Bell-function values, in conventional and topological quantum-phase transitions. First, by using the quantum-renormalization-group method, we show that the Bell function value of a three-qubit Bell inequality in the anisotropic spin-1/2 XY model exhibits singular behaviors at the critical point. Moreover, for topological quantum-phase transitions, we find that the first-order derivative of the Bell-function value of the well-known Clauser-Horne-Shimony-Holt inequality in the Kitaev-Castelnovo-Chamon model behaves singularly at the topological-phase-transition point. Our results have established a link between quantum nonlocality and phase transitions. © 2012 American Physical Society.|
|Source Title:||Physical Review A - Atomic, Molecular, and Optical Physics|
|Appears in Collections:||Staff Publications|
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