We study the multipartite quantum correlation (MQC) in a quantum transverse
Ising model with the tunable triangular configuration. It is found that the
anisotropic coupling can modulate the MQC in the frustrated phase and the MQC
combined with its susceptibility can distinguish the frustrated and the
nonfrustrated regimes in the ground state. Furthermore, we analyze the
correlation properties at finite temperatures, where the MQC in the
nonfrustrated phase is high at zero temperature but thermally fragile, which
stems from the competition of the eigenvectors in the thermal state.
Interestingly, in the frustrated phase, there is a trade-off relation between
high quantum correlation and strong thermal robustness by tuning the
anisotropic interactions, where the MQC can attain to a relatively higher value
and have the well robustness to temperature at the same time. In addition, an
experimental scheme for the MQC modulation via anisotropic coupling is
discussed in the system of cold atoms trapped in an optical lattice.
Archived Files and Locations
|application/pdf 1.6 MB