Quantum Correlations in a Few-Atom Spin-1 Bose-Hubbard Model
arXiv:1210.0414 · doi:10.1088/0031-8949/2013/T153/014008
Abstract
We study the thermal quantum correlations and entanglement in spin-1 Bose-Hubbard model with two and three particles. While we use negativity to calculate entanglement, more general non-classical correlations are quantified using a new measure based on a necessary and sufficient condition for zero-discord state. We demonstrate that the energy level crossings in the ground state of the system are signalled by both the behavior of thermal quantum correlations and entanglement.
arXiv commentTo be published in the Proceedings of CEWQO-2012
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