Ndjomatchoua F. T., Tchawoua C., Tchinang J. D. T., Le Rü Bruno, Tonnang H. E. Z. (2015). Discrete Davydov's soliton in alpha-helical protein molecule with anharmonic hydrogen bond and thermal noise. Communications in Nonlinear Science and Numerical Simulation, 29 (1-3), p. 148-160. ISSN 1007-5704.
Titre du document
Discrete Davydov's soliton in alpha-helical protein molecule with anharmonic hydrogen bond and thermal noise
Ndjomatchoua F. T., Tchawoua C., Tchinang J. D. T., Le Rü Bruno, Tonnang H. E. Z.
Source
Communications in Nonlinear Science and Numerical Simulation, 2015,
29 (1-3), p. 148-160 ISSN 1007-5704
An improvement of the Davydov's model for energy transfer in alpha-helix protein is proposed. Using hyperbolic cosine potential type to model hydrogen bond potential, we have obtained from the adiabatic approximation, a discrete nonlinear Schrodinger equation with inverse hyperbolic sine nonlinearity. Using the two-dimensional discrete map approach, we have found a linearly stable intrinsic localized mode of the corresponding developed equation. Mobility of the intrinsic localized mode was achieved by moving the local impurity hypothesized as the anomalous band energy. The reactivity of the discrete breather under thermal noise was studied numerically with the Langevin's approach. It was shown that the intrinsic localized mode in the developed model keep its shape longer under thermal bath.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
