Browsing Dept. of Physics - Master's degree by Title
Now showing items 157-170 of 170
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Temperature dependent density profiles and collective oscillations of dipolar droplets
(Bilkent University, 2019-09)Dipolar droplets are a novel form of Bose gas that form in a regime where the mean field theory predicts collapse. In the literature, the beyond mean field e ects in the form of the Lee-Huang-Yang correction to the local ... -
A theoretical model for the epitaxial growth of Si(100) surface
(Bilkent University, 2000)In this thesis, we investigated atomic scale mechanisms of growth on the Si(lOO) surface. First principles quantum molecular dynamics calculations are performed, where self-consistent field electronic structure calculations ... -
Thermoelectric efficiency in model nanowires
(Bilkent University, 2013)Nowadays, the use of thermoelectric semiconductor devices are limited by their low efficiencies. Therefore, there is a huge amount of research effort to get high thermoelectric efficient materials with a fair production ... -
Tight binding modeling of two dimensional and quasi-two dimensional materials
(Bilkent University, 2017-09)Since the advent of graphene, two-dimensional (2D) materials have consistently been studied owing to their exceptional electronic and optical properties. While graphene is completely two-dimensional in nature, its other ... -
Time dependent study of quantum bistabiliity
(Bilkent University, 1995)The analysis of quantum transport phenomena in small systems is a prominent topic of condensed matter physics due to its numerous technological applications. The current analytical theories are not adequate for ... -
A time-dependent study of bistability in resonant tunneling structures
(Bilkent University, 1997)A comjDutational time-dependent study of the bistability in resonant tunneling structures including the electron-electron interactions is presented. A new computational method for the investigation of many jDarticle ... -
Tuning the exciton-plasmon coupling
(Bilkent University, 2012)Exciton-plasmon coupling has recently drawn much interest. In this work, FDTD simulations of exciton-plasmon coupling in plasmonic cavity structures with corrugation patterns are investigated. Excitonic modes are obtained ... -
Two-temperature Ising model at an exact limit
(Bilkent University, 2008)We analyze the order-disorder transition for a two dimensional Ising model. We consider a ferromagnetic exchange interaction between the nearest neighbor Ising spins. The spin exchanges are introduced in two different ... -
A variational approech to stationary and rotating Bose-Einstein condensates
(Bilkent University, 2006)After the experimental demonstration of Bose-Einstein condensation (BEC) in alkali gases [6, 7, 18], the number of theoretical and experimental papers on ultracold atomic physics increased enormously [48]. BEC experiments ... -
Variational Monte Carlo calculations for Bose-Hubbard model based on projected wavefunctions
(Bilkent University, 2014)Bose-Hubbard model is mainly used to describe and study the interactions between neutral atomic gases trapped in an optical lattice [1] and Josephson junction arrays [2]. It is one of the toy models to understand quantum ... -
Variational Monte Carlo study of two dimensional charged bosons
(Bilkent University, 2014-09)We studied the ground state properties of 2D charged Bosons interacting via Coulomb potential using the Variational Monte Carlo method. We start with the paper of McMillan [1] in which there are 3D Bosons interacting via ... -
Variational study of interacting su-schrieffer-heeger model
(Bilkent University, 2018-09)The interacting Su-Schrieffer-Heeger model with nearest neighbor interaction in one dimension at half-filling is studied. To obtain ground state wave function, the Baeriswyl variational wave function is extended to account ... -
Vortex transfer in charged-neutral superfluid mixtures
(Bilkent University, 2013)Bose-Einstein Condensation (BEC) was introduced by Einstein 1925. It took 70 years to confirm BEC by experiments. BEC creates a suitable environment to observe macroscopic-quantum behavior. Condensates consist of ultracold ... -
Ytterbium doped all-fiber integrated high power laser systems and their applications
(Bilkent University, 2013)For the past decades, high-power laser technology has been developing rapidly all over the world. The scientific interest in fiber lasers stems from the rich nonlinear dynamics. Industrial interest is largely due to their ...
