On the other hand, it is seen that the S 1 and S 2 states by DTCAM-AEE are quite consistent with those of δ -CR-EOMCC(2,3). Also, the S 1 by DTCAM-AEE is constantly lower than that of BH&HLYP throughout the entire region, without the over-stabilization of S 1,min . As a result, the population changes by DTCAM-AEE (dashed line in Fig. ) are quite consistent with those by BH&HLYP (solid line).