Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 23 for “"Quantum Corrections"”.
-
On Vacuum Structures and Quantum Corrections in String Theory
… a viable candidate for a UV complete theory of quantum gravity. Its compactifications result in a landscape of string vacua encompassing an immensely rich and diverse structure of EFTs. Extracting reliable low energy information from string compactifications notoriously requires a systematic …
-
Exact renormalized one-loop quantum corrections to energies of solitonic field configurations
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
-
Investigations in the theory of quantum corrections to classical solutions of the Yang-Mills equations
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1979
-
Theory of carrier transport in III-Nitride based heterostructures
… focusing on transport properties of (In,Ga)N/GaN quantum well systems. More specifically, the non-equilibrium Green's function (NEGF) formalism has been employed to study ballistic transport in a fully quantum mechanical setting. This builds on a tight-binding description of the electronic …
-
Monte Carlo Simulation of Silicon Devices Including Quantum Correction and Strain
… simulation is advanced on two fronts. First, quantum effects are taken into account by including quantum corrections in the semiclassical Monte Carlo framework. A quantitative study of corrections based on the Wigner transport equation and the effective potential is performed, and the …
-
Two-loop corrections to the rho-propagator in the Kroll-Lee-Zumino theory
… Kroll-Lee-Zumino theory is a renormalizable quantum field theory of charged pions and neutral rho-mesons. It provides the quantum field theory platform for the vector meson dominance model, allowing for a systematic computation of quantum corrections in perturbation theory (the ρ-π-π coupling …
-
Advancing integrability for strings in AdS3/CFT2
… in integrability techniques for obtaining quantum corrections to physical quantities such as the energies of string solutions. Lastly, we consider the scattering of fundamental string excitations and derive all-loop expressions for the scattering matrix that includes both massless and …
-
Path integrals and the quantum Routhian
… thesis, we consider the use of the Routhian in quantum mechanics, which is an object halfway between a Lagrangian and a Hamiltonian expressing the dynamics of a system in terms of conserved momentum and non-cyclic coordinates. Starting from the phase space path integral, we derive an expression …
-
Controlled derivation of semiclassical transport equations for electroweak baryogenesis
… equation. In the fermionic equations we find quantum corrections that give rise to sources for baryogenesis.
-
Monte Carlo study of current variability in UTB SOI DG MOSFETs
… captures non-equilibrium transport, includes quantum effects and maintains computational efficiency is essential for the study of this scattering mechanism. Therefore, a 3D Monte Carlo simulator has been developed which includes this scattering effect in an ab initio fashion, and quantum …
-
Radiative Corrections to and Connections Among Theories With Lorentz Violation and Time-Varying Couplings
… Lorentz, CPT and gauge symmetry violations in quantum electrodynamics. The vacuum polarization diagram and fermion self-energy are studied in order to study the consequences of a time-varying &alpha on photon and fermion propagation. </p> <p> In the weak sector, light curves of type Ia …
-
Radiative symmetry breaking in the supersymmetric minimal B-L extended standard model
… asymmetry of the Universe. When we include quantum corrections to the Higgs potential of the model, we find that Radiative B-L symmetry breaking occurs through the interplay between large Majorana Yukawa couplings and SUSY breaking masses. This realization shows that B-L symmetry breaking …
-
Transport and tunneling in multiwalled carbon nanotubes
… The mean free path is so short that the quantum corrections to conductivity, the weak localization correction and the interaction correction, are best described using the theory for a two-dimensional conductor. The samples are found to be close to the strong localization limit, and the …
-
Gate leakage variability in nano-CMOS transistors
… device simulation approach with density-gradient quantum corrections, as the most established framework for the study of device variability. The simulator is first extended to model the direct tunnelling of electrons through the gate dielectric, by means of an improved WKB approximation. A study …
-
Classical and thermodynamic stability of black holes
… which represent pathologies in the one-loop quantum corrections. In particular, we extend this study to charged black holes (Reissner-Nordstr¨om), using a method based on gauge-invariant perturbations, and to rotating black holes (Kerr-AdS), where a numerical technique is employed. In the …
-
E6 inspired supersymmetric models
… which keep the Higgs mass stable against the quantum corrections from higher energy physics, but do not contain the mu-problem or little hierarchy problem of the Minimal Supersymmetric Standard Model (MSSM). Also, unlike conventional Grand Unified Theories, the E6 inspired models do not …
-
Aspects of Non-Perturbative Renormalization
… are exact in the sense that they contain all quantum corrections. In the framework of these renormalization group equations, field theories with periodic self interaction can be considered without violating the essential symmetry of the model: the periodicity. Both methods - the …
-
Effective loop quantization of black holes : a comparative analysis of quantization schemes.
… two polymerization parameters that characterize quantum corrections in effective loop quantum gravity (LQG). In this dissertation we systematically carry out the following investigations in the framework of the Kantowski-Sachs (KS) gauge: (a) We first study a top-down quantization that is derived …
-
Spin States in Bismuth and Its Surfaces: Hyperfine Interaction
… Bi(111) film deposited on mica, we develop quantum magnetotransport techniques as delicate tools to study hyperfine interaction. The approach is based on measuring quantum corrections to the conductivity due to weak antilocalization, which depend on the coherence of the spin state of the …
Page 1 of 2