Abstract:
Solitons play a pivotal role in many scientific and engineering phenomena. Solitons are a
special kind of nonlinear waves that are able to maintain their shape along the
promulgation. From the last four decades, the rampant part of fundamental phenomenon
of soliton has successfully attracted the researchers from the physical and mathematical
sciences. Various branches of science like solid-state physics, plasma physics, particle
physics, biological systems, Bose-Einstein-condensation and nonlinear optics are
enjoying the benefits taken from soliton. Soliton research gives way to theoretical aspects
such as soliton existence, computation of soliton profiles and soliton stability theory by
using the tools of soliton dynamics and soliton interactions to applicative aspects.
The hub of this thesis is to search not only for the solitary solutions of nonlinear
differential equations but also for nonlinear fractional differential equations. This piece of
writing targets to give an intuitive grasp for; Further Improved (G /G) -expansion,
Extended Tanh-function, Improved (G /G) -expansion, Alternative (G /G) -expansion
with generalized Riccati equation, (G /G, 1/G) -expansion and Novel (G /G) -
expansion methods. Moreover, we shall extend Novel (G / G) -expansion method to
nonlinear fractional partial differential equations arising in mathematical physics. For
multifarious applications, all the methods are glib to follow. In addition, these methods
give birth to several types of the solutions like hyperbolic function solutions,
trigonometric function solutions and rational solutions. The premeditated methods are
very efficient, reliable and accurate in handling a huge number of nonlinear differential
equations.
