Rosalie WOULACHE

solitons in nonlinear deformable systems with impurities

The concept of solitons in the nucleation processes in nonlinear deformable systems

• Broschiertes Buch

Produktbeschreibung

The purpose of this thesis is the study of the influence of impurities on the nucleation rate of kink-antikink pairs in nonlinear deformable systems. We study the dynamics of solitary waves in the generalized Frenkel-Kontorova (GFK) model, discussed about kink profiles and energy in the continuum limit of this model and present Some conclusions concerning the interactions of kink in the system.The influence of the Gaussian approximation on the nucleation rate of kink-antikink pairs in a nonlinear deformable chain is performed and a new formula for the nucleation rate of kink-antikink pairs is determined. Using the Kolmogorov method in the GFK model in the presence of external forces and impurities, we set o analytical expression of the nucleation rate in the system. A Numerical application of this theory is made by using existing data. We end by investigating the role of the applied field on the nucleation process in an inhomogeneous deformable chain. The Hamiltonian formalism allows us to model the system. We derive numerically the depinning threshold field of the system and show the in uence of the deformability of the impurity potential on this depinning threshold field.

Produktdetails

• Verlag: LAP Lambert Academic Publishing
• Seitenzahl: 132
• Erscheinungstermin: 15. März 2011
• Englisch
• Abmessung: 220mm x 150mm x 8mm
• Gewicht: 215g
• ISBN-13: 9783838390499
• ISBN-10: 3838390490
• Artikelnr.: 33212280

Autorenporträt

Rosalie Laure WOULACHEDr WOULACHE is a Lecturer at the University of Yaounde I inCameroon and currently works in the field of nonlinear dynamics.She is interested on the nucleation in nonlinear deformablesystems with impurities and also interested in the moleculardynamic simulations in nanotribology.