Quantum correlations in a few-atom spin-1 Bose-Hubbard model
Çakmak, Barış and Karpat, Göktuğ and Gedik, Zafer (2013) Quantum correlations in a few-atom spin-1 Bose-Hubbard model. Physica Scripta, T153 . ISSN 0031-8949 (Print) 1402-4896 (Online)
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Official URL: http://dx.doi.org/10.1088/0031-8949/2013/T153/014008
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.
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