Genuine-multipartite-entanglement trends in gapless-to-gapped transitions of quantum spin systems
Anindya Biswas, R. Prabhu, Aditi Sen(De), Ujjwal Sen
2014
Physical Review A. Atomic, Molecular, and Optical Physics
We investigate the behavior of genuine multiparticle entanglement, as quantified by the generalized geometric measure, in gapless-to-gapped quantum transitions of one- and two-dimensional quantum spin models. The investigations are performed in the exactly solvable one-dimensional XY models, as well as two-dimensional frustrated J_1-J_2 models, including the Shastry-Sutherland model. The generalized geometric measure shows non-monotonic features near such transitions in the frustrated quantum
more »
... stems. We also compare the features of the generalized geometric measure near the quantum critical points with the same for measures of bipartite quantum correlations. The multipartite quantum correlation measure turns out to be a better indicator of quantum critical points than the bipartite measures, especially for two-dimensional models.
doi:10.1103/physreva.90.032301
fatcat:3fyvpdmgf5etfj3pe2i2ul7agu