Entanglement correlation in mixed states for anharmonic vibrations in ozone

Entanglement dynamics of anharmonic vibrations in molecule O₃ is studied in terms of the linear entropy and negativity with various initial states that are, respectively, taken to be the mixed density matrices of coherent states on each normal mode. It is shown that with a suitable parameter in initial states, the entropy in one mode can be positively correlated or anti-correlated with negativity. The behavior of correlation between two entropies for two modes, negativity, and mutual entropy is discussed as well.