AI Article Synopsis
- We studied how different types of geometric quantum discords (GQDs) decay in two interacting qubits using the Heisenberg XY model, which are also connected to thermal environments.
- By adjusting the parameters of the qubit interactions, we found that the decay rates of the GQDs could be slowed down compared to noninteracting qubits.
- In the long run, modifying the anisotropy of the model and the strength of the transverse magnetic field significantly improved the GQDs, and we identified interesting relationships between various GQDs that affect quantum correlations, including sudden changes in their dynamics.
Article Abstract
We examined decay dynamics of various geometric quantum discords (GQDs) for two interacting qubits described by the Heisenberg XY model and further coupled independently to their respective thermal reservoirs. Compared to the case of noninteracting qubits, our results showed that decay rates of the GQDs can be retarded apparently by properly choosing system parameters of the interaction term. In the long-time limit, the asymptotic values of the GQDs are enhanced evidently by tuning anisotropy of the model and strength of the transverse magnetic field. We further illuminated the relations between different GQDs on characterizing quantum correlations, and observed multiple sudden change behaviors of their dynamics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469867 | PMC |
| http://dx.doi.org/10.1038/s41598-017-03535-w | DOI Listing |
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