Sökning: "matter theory"
Visar resultat 16 - 20 av 739 avhandlingar innehållade orden matter theory.
16. Quasiparticles in the Quantum Hall Effect
Sammanfattning : The fractional quantum Hall effect (FQHE), discovered in 1982 in a two-dimensional electron system, has generated a wealth of successful theory and new concepts in condensed matter physics, but is still not fully understood. The possibility of having nonabelian quasiparticle statistics has recently attracted attention on purely theoretical grounds but also because of its potential applications in topologically protected quantum computing. LÄS MER
17. Hidden patterns that matter : statistical methods for analysis of DNA and RNA data
Sammanfattning : Understanding how the genetic variations can affect characteristics and function of organisms can help researchers and medical doctors to detect genetic alterations that cause disease and reveal genes that causes antibiotic resistance. The opportunities and progress associated with such data come however with challenges related to statistical analysis. LÄS MER
18. New horizons in string theory : bubble babble in search of darkness
Sammanfattning : It was discovered nearly two decades ago that we live in an accelerating universe that is dominated by dark energy. Understanding the origin of such an energy has turned out to be a very difficult open question in physics, and calls on the need for a fundamental theory like string theory. LÄS MER
19. Insights into Materials Properties from Ab Initio Theory : Diffusion, Adsorption, Catalysis & Structure
Sammanfattning : In this thesis, density functional theory (DFT) calculations and DFT based ab initio molecular dynamics simulations have been employed in order to gain insights into materials properties like diffusion, adsorption, catalysis, and structure. In transition metals, absorbed hydrogen atoms self-trap due to localization of metal d-electrons. LÄS MER
20. Theory and Application of the Mechanics of Graphene Sheets
Sammanfattning : Starting from an atomistic approach, I derive a hierarchy of successively more simplified continuum elasticity descriptions for modeling the mechanical properties of suspended graphene sheets. It is shown that graphene sheets with clamped edges have an intrinsic nonlinear mechanical response due to a variable tension induced by stretching. LÄS MER