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In this paper, we try to study the quantum discord dynamics in a complexcorrelated photon-matter model, which is modified from theTavis-Cummings-Hubbard model - a common cavity quantum electrodynamics model.The target model consists of two hydrogen atoms. A neutral hydrogen moleculecan be obtained through an association reaction and disintegrated throughdissociation reaction. The formation and breaking of covalent bond isaccompanied by the creation and annihilation of phonon. Compared with previousefforts, studying the quantum discord dynamics of this complicated system ismore challenging than it was for the simple quantum system, which consisted ofa single two-level atom. For convenience, we adopt a bipartite split of themultiqubit system and the two-qubit von Neumann projective measurement on theobserved subsystem. We attempt to examine the dissipative dynamics in openquantum system in addition to the unitary evolution of closed quantum system.We are dedicated to identifying the regularity of quantum correlation as thebasis for future research on more complex quantum systems, specificallyincluding the impacts of nuclei tunneling effect, covalent bond intensity, anddissipation strengths of photon and phonon on quantum discord.

Investigating the quantum discord dynamics with a bipartite split of the multiqubit system in the correlated photon-matter model