  We investigate the non-Markovian dynamics of quantum correlation between two
initially entangled nitrogen-vacancy centers (NVC) embedded in photonic crystal
cavities (PCC). We find that a finite quantum correlation is preserved even
asymptotically when the transition frequency of the NVC is within the band gap
of the PCC, which is quantitatively different from the result of approaching
zero under the Born-Markovian approximation. In addition, once the transition
frequency of NVC is far beyond the band gap of the PCC, the quantum correlation
initially prepared in NVC will be fully transferred to the reservoirs in the
long-time limit. Our result reveals that the interplay between the
non-Markovian effect of the structured reservoirs and the existence of
emitter-field bound state plays an essential role in such quantum correlation
preservation. This feature may open new perspectives for devising active
decoherence-immune solid-state optical devices.
