Theoretical and Applied Physics
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This collection belongs to the Masters graduands of Theoretical and Applied Physics department in AUST . They are rigorous research work in different areas under this field of study, which can be applied and used to solve identified Scientific problems.
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Modeling of the Origin and Interactions of Multisoliton Solutions of the (2+4)KdV Equation
(AUST, 20190605)Most of the relevant research work has addressed the properties of internal solitons in a greatly simplified environment, usually in the framework of different versions of the two layer fluid. The simplest equation of this ...

Femtosecond laser pulses interacting with atoms
(AUST, 20190916)We theoretically investigated a phenomena arising from the interaction of femtosecond pulsed lasers with an Hydrogen atom. The phenomena of interest to us, is the High or der Harmonic Generation (HHG) of soft and hardXray ...

Structural and electronic properties of a twodimensional hybrid system of graphene and hexagonal boron nitride: A firstprinciples study
(AUST, 20190602)Despite the excellent properties of graphene, graphene based electronic devices are yet to be realized, one of the reason for such is the absence of band gap in graphene. Due to its large band gap, hexagonal boron nitride ...

Buoyancy Effects on Human Skin Tissue Thermoregulation due to Environmental Influence
(AUST, 20190605)This paper theoretically examines the impact of thermal buoyancy on human skin tissue’s blood flow, heat exchange and their interaction with the surrounding environment using a two phase mathematical model that relies on ...

Coherence Control of Tunneling
(AUST, 20190614)The phase space representation of quantum mechanics are well known as powerful tools for studying the correspondence between the density operator and classical distributions in phase space. This representation, known as ...

Stability and Bifurcation Analysis of a HindmarshRose Neuronal Model With Time Delay
(AUST, 20190720)In this research work, we study and analyse HindmarshRose neuronal system with time delay. Considering the fast subsystem of the model, all the possible nonnegative equilibria are obtained and their local as well as ...

NoiseEnhanced Directed Transport of Cold Atoms
(20210314)The possibility of enhancing directed transport for a driven quantum particle in the presence of noise is investigated. Specifically, we deal with cold atoms trapped in an asymmetric optical lattice potential (ratchet ...

Finite Pulse Ratchet Effect of Cold Atoms
(20210323)The thesis presents the modelling and simulation of the rachet effect created by a spatio temporal asymmetry potential. The potential is a coupled spatial asymmetry sin wave and a rectangular pulse train. The effective ...

GrapheneHexagonal Boron Nitride Work Function Response to Uniform Planar Deformations: An ab initio DFT Study
(20210423)A twodimensional hybrid material with graphene and hexagonal boron (hBN) domain is considered as viable material for future generations of flexible electronic devices due to the tunable band gap, excellent mechanical and ...

Ratchet Current Landscape at Quantum Resonance
(20201214)The ratchet effect is the rectified motion of atoms using an unbiased driving force. By ‘’unbiased’’ we mean to say that the timeaverage is equal to zero. This can be accomplished experimentally using cold atoms in a ...

Effect of Disorder on Spin Transport in Topological NonTrivial Magnetic Textures
(201906)An eﬀect that is observed when an electron passes through a noncollinear magnetic textures such as skyrmion, the electron gets deviated as a result of the ﬁctitious magnetic ﬁeld generated by the skyrmion giving rise to ...

Biomechanics of Surface Runoff and Soil Water Percolation
(20190623)In this study, the complex interaction of surface runoff with the biomechanics of soil water transport and heat transfer rate is theoretically investigated using mathematical model that rely on the two phase flows of an ...

Structural, Electronic and Optical Properties of Cu 2 Sns 3 Solar Absorber: A FirstPrinciple Density Functional Theory Investigation
(20190623)The development of inexpensive, nontoxic, high efficiency and earthabundant solar absorbers is critical for terawatt scale implementation of photovoltaics. Cu 2 SnS 3 is a promising earth abundant absorber material that ...

Pulsed Lasers in Lidar Application: Models for Optimizing Wind Turbine Performance
(20190622)Since the appearance of the first wind turbines at the end of the nineteenth century, wind energy has been considered to be a renewable energy source for not just developed countries but also developing countries as well. ...

Theoretical Study of CurrentInduced Dynamics of an Antiferromagnetic Skyrmionium
(20190622)In this thesis, we present a theoretical study on the currentinduced nucleation and propagation of antiferromagnetic skyrmionium. A skyrmionium, also known as 2πskyrmion, is a vortexlike magnetic structure characterized ...

Topological Antiferromagnetic Magnons
(20190712)We have studied a model for a noncollinear but coplanar antiferromagnetic spin texture on a two dimensional kagome lattice structure in the presence of DzyaloshinskiiMoriya Interaction (DMI). We observed some interesting ...

Tight Binding Descriptions of Graphene and Its Derivatives
(20171220)Graphene is an eﬀectively two dimensional form of carbon atoms arranged in honeycomb lattice. Due to its lightweight, high electron mobility and other special electronic properties it is considered both an academically ...

Combination and Tracking Control of Chaotic Systems
(20160620)Combinationcontrol of two or more systems which may have important application in Josephson junction ratchet array, and other physical systems has not been explored. Most of the theoretical framework is on combination ...

First Principle Study: Absorption of Molecular Hydrogen Sulphide on Gold Clusters
(20091113)We present theoretical results of the study of H 2 S adsorption on gold cluster Au n (n = 1, 5) using density functional theory with PerdewBurkeErnzerhof (PBE) exchangecorrelation energy functional. Minimum energy ...

Ab Initio Density Study of N and O Coadsorption on Pt(100) and Pt(111)
(20091113)We have used ab initio density functional theory to study the coadsorption of N and O on Pt(100) and Pt(111) surfaces. Our calculations show that on Pt(100) the most favourable site is the hollow site for N and the bridge ...