By Ilya Prigogine, Stuart A. Rice

The Advances in Chemical Physics sequence offers the chemical physics box with a discussion board for serious, authoritative reviews of advances in each sector of the self-discipline. quantity 121 comprises the newest learn on polymer melts at strong surfaces, infrared lineshapes of vulnerable hydrogen bonds, ab initio quantum molecular dynamics, and lots of different topics.

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**Extra info for Advances in Chemical Physics Vol. 121**

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0 ^ SO X hÈf j À " h2 qQq ‘ jÈn0 ihÈn0 jH jÈi i n þ n0 Ei À En 0 ¼ hÂf 0 jQ‘ jÂi iTfi ð3:83Þ ultrafast dynamics and spectroscopy 39 where " # 0 0 ^ SO ^ SO X hÈf jH jÈn ihÈn j À " h2 qQq ‘ jÈi i X hÈf j À "h2 qQq ‘ jÈn0 ihÈn0 jH jÈi i Tfi ¼ þ Ei À E n Ei À En0 n n0 ð3:84Þ From Eq. 84) we can see that the summation over n covers the singlet electronic states, while the summation over n0 covers the triplet electronic states. f ¼ Pi hÂf 0 j jÂi i dðEf 0 À Ei Þ ð3:85Þ h " qQ‘ 0 Here for simplicity it is assumed that there is only one promoting mode.

In this section we shall show that the damping operator results from the interaction between the system and heat bath. Next we shall consider the case ^ ¼H ^s þ H ^b þ H ^0 H ð4:45Þ ^ 0 denotes the interaction between the system and heat bath. We shall where H ^, attempt to derive the equation of motion for the density matrix of the system s reduced density matrix, by starting from d^ r i ^ ^ ¼ À ½H; r dt h " ð4:46Þ For this purpose we introduce smn ¼ X rma;na ð4:47Þ a where ðm; nÞ describes the system while ða; bÞ describes the bath.

H. lin et al. 0438 Angles (degrees) between the transition moments of the special pair dimer. Angles of the transition moments with the membrane normal. peak ratios j~ me1 g j2 =j~ me2 g j2 , j~ me3 g j2 =j~ me2 g j2 , and j~ me4 g j2 =j~ me2 g j2 , they are found to simultaneously agree with the values presented in Table III. Table IV lists the calculation results of the delocalized model, including the angles between any two Bchls and the transition dipole moment intensity ratios j~ me1 g j2 =j~ m e2 g j 2 , 2 2 2 2 me2 g j , and j~ me4 g j =j~ me2 g j at various temperatures.