Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice

Details Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice

2007-04-02

arxiv.org/abs/0704.0172v1

Phys. Rev. B 75, 205442 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 9 figures

Scientific paper

10.1103/PhysRevB.75.205442

We show that temperature and magnetic field properties of the entanglement between spins on the two-dimensional Shastry-Sutherland lattice can be qualitatively described by analytical results for a qubit tetramer. Exact diagonalization of clusters with up to 20 sites reveals that the regime of fully entangled neighboring pairs coincides with the regime of finite spin gap in the spectrum. Additionally, the results for the regime of vanishing spin gap are discussed and related to the Heisenberg limit of the model.

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