124114 (2008). 

15 A.S. Davydov and N.I. Kislukha, Zh. Eksp. Teor. Fiz. 71 , 1090 (1976) [Sov. Phys. JETP 44 , 571 (1976)]. 16 

A.S. Davydov, Solitons in Molecular Systems (Reidel, Dor- drecht, 1985). 17 

M. J. ˇ Skrinjar, D. V. Kapor, and S. D. Stojanovi´c, Phys. Rev. A 38 6402 (1988). 18 

W. F¨ orner, J. Phys.: Condens. Matter 5 3897 (1993). 19 

L. Cruzeizo-Hansson, Phys. Rev. Lett. 73 2927 (1994). 20 

L. Cruzeizo-Hansson and S. Takeno, Phys. Rev. E 56 894 (1997). 21 

A.M. Clogston, Phys. Rev. E 58 6407 (1998). 22 

S. Gheorghiu-Svirschevski, Phys. Rev. E 64 051907 (2001). 23 

L. Cruzeiro, J. Biol. Phys. 35 43 (2009). 24 

P.A.M. Dirac, Proc. Cambridge, Phil. Soc. 26 , 376 (1930); J. Frenkel, Wave Mechanics (Oxford Univ. Press, 1934). 25 

H. Fr¨ o lich, Proc. R. Soc. London, Ser. A 215 , 291 (1952); Adv. Phys. 3 , 325 (1954). 26 

T. Holstein, Ann. Phys. (N.Y.) 8 , 325 (1959); 8 , 343 (1959). 27 

G. D. Manhan Many-Particle Physics (Plenum, New York, 1990). 28 

N. Lu and S. Mukamel, J. Chem. Phys. 95 , 1588 (1991). 29 

S. Mukamel, Principles of Nonlinear Optical Spectroscopy 

(Oxford, New York, 1995) 

30 K. Huang and A. Rhys, Proc. R. Soc. London, Ser. A 204 , 406 (1950). 31 

C. Itzykson and J. Zuber, Many-Particle Physics , McGraw-Hill Inc (1980). 32 

T. Meier, Y. Zhao, V. Chernyak, and S. Mukamel, J. Chem. Phys. 107 3876 (1997). 33 

Y. Zhao, T. Meier, W. M. Zhang, V. Chernyak, and S. Mukamel, J. Phys. Chem. B 103 , 3954 (1999). 34 

Y. Zhao et al. , J. Chem. Phys. 113 , 6502 (2000). 35 

Y. Zhao, D.W. Brown, and K. Lindenberg, J. Chem. Phys. 100 , 2335 (1994). 36 

Y. Zhao, S. Yokojima, and G. Chen, J. Chem. Phys. 113 , 4016 (2000). 37 

G. Grippenberg, S.O. Londen and O. Staffans, Volterra integral and functional equations , Cambridge University Press (1990). 38 

C.W. Gear, Numerical Initial Value Problems in Ordinary Differential Equations (Englewood Cliffs, NJ: Prentice- Hall, 1971), Chapter 2. 39 

J. D. Lambert, Numerical methods for ordinary differential systems: the initial value problem , John Wiley & Sons, Inc., New York, NY (1991). 

