Geometric quantum discord and entanglement between two atoms in Tavis-Cummings model with dipole-dipole interaction under intrinsic decoherenceKai-Ming Fan and Guo-Feng ZhangEur. Phys. J. D, 68 6 (2014) 163DOI: https://doi.org/10.1140/epjd/e2014-50145-0