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Quantum correlations in multiple quantum (MQ) NMR experiments areinvestigated in two-spin systems (dimers). In the initial moment of time onespin is in a pure quantum polarized state and the other spin is in thethermodynamic equilibrium state defined by the temperature of the sample. MQNMR dynamics of dimers is investigated. It is shown that MQ NMR coherences ofonly the zeroth and second orders emerge in such a system. The intensities ofthose coherences are calculated. Entangled states appear in the course of thesystem evolution in the MQ NMR experiment. The quantum discord is obtained inthe high temperature approximation.

Quantum entanglement and quantum discord in dimers in multiple quantum NMR experiments