Exciton-phonon damping in the two and three-dimensional anisotropic XY model*

The effect of exciton-phonon interaction on spin transport properties and quantum information is analysed in the integer spin XY model with ion-single anisotropy in dimension d=2,3 in the square and cubic lattices and in the neighbourhood of a quantum critical point D_c using the SU(3) Schwinger boson approach. For three dimensions, there is a quantum phase transition from the Nèel phase to paramagnetic phase where recently, one has investigated the influence of this quantum phase transition on spin transport and obtained a strong influence of the line of separation among the phases on continuum spin conductivity.




Keywords:
spin transport, quantum entanglement, spin-phonon

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