Browsing Department of Physics by Title
Now showing items 337356 of 1791

Early stages in cosmic structure formation
(Massachusetts Institute of Technology, 2004)This thesis investigates the origin and evolution of large scale structure in the universe. We approach these questions from two different angles in two related but independent projects. The outcomes of these two investigations ... 
The edge of thermodynamics : driven steady states in physics and biology
(Massachusetts Institute of Technology, 2017)From its inception, statistical mechanics has aspired to become the link between biology and physics. But classical statistical mechanics dealt primarily with systems in thermal equilibrium, where detailed balance forbids ... 
Edge plasma phenomena in the Alcator CMod tokamak measured by high resolution Xray imaging diagnostics
(Massachusetts Institute of Technology, 2000)In this thesis high resolution soft xray measurements from the Alcator CMod plasma edge are presented for a variety of different plasma conditions. These measurements provide radial profiles of the soft xray emissivity ... 
Edge tunneling and transport in nonabelian fractional quantum Hall systems
(Massachusetts Institute of Technology, 2008)Several aspects of tunneling at the edge of a fractional quantum Hall (FQH) state are studied. Most examples are given for the non abelian filling fraction ? = 5 2 MooreRead Pfaffian state. For tunneling between opposite ... 
The effect of crystalline orientation and band nonparabolicity on the electronic properties of bismuth nanowires
(Massachusetts Institute of Technology, 2008)Due to the unique electronic properties of bismuth, bismuth nanowires provide an attractive lowdimensional system for studying quantum confinement effects, and have generated much interest in both optical and thermoelectric ... 
The effect of higher order moments in the postNewtonian gravitational wave expansion on parameter estimation
(Massachusetts Institute of Technology, 2008)The purpose of this thesis is to investigate both the qualitative and quantitative effects of including higher order amplitude terms in the postNewtonian expansion for gravitational waves on parameter estimation of ... 
The effect of magnetic field on the breakdown of gases at high frequencies
(Massachusetts Institute of Technology, 1949) 
Effect of magnetic seed fields on Lyman Alpha emission from distant quasars
(Massachusetts Institute of Technology, 2016)There are indications that weak magnetic fields originating in the early Universe and magnified via magnetohydrodynamic (MHD) processes could cause perturbations in the thermodynamic state of the gas in the intergalactic ... 
The effect of quantum confinement on the thermoelectric figure of merit
(Massachusetts Institute of Technology, 1999)The thermoelectric figure of merit (Z) determines the usefulness of a material for thermoelectric energy conversion applications. Since the 1960's, the best thermoelectric material has been Bi2Te3 alloys, with a ZT of 1.0 ... 
The effect of quantumwell superlattices on the thermoelectric figure of merit
(Massachusetts Institute of Technology, 1996) 
Effective action approach to quantum phase transitions in bosonic lattices
(Massachusetts Institute of Technology, 2009)In this thesis, I develop a new, fieldtheoretic method for describing the quantum phase transition between Mott insulating and superfluid states observed in bosonic optical lattices. I begin by adding to the Hamiltonian ... 
Effective field theories for inclusive B decays
(Massachusetts Institute of Technology, 2006)In this thesis, we study inclusive decays of the B meson. These allow one to determine CKM elements precisely and to search for physics beyond the Standard Model. We use the framework of effective field theories, in ... 
Effective field theories for the LHC
(Massachusetts Institute of Technology, 2016)In this thesis I study applications of effective field theories to understand aspects of QCD jets and their substructure at the Large Hadron Collider. In particular, I introduce an observable, D2 , which can be used for ... 
The effective temperatures and physical properties of red supergiants : the effects of metallicity.
(Massachusetts Institute of Technology, 2006)In this thesis I use moderateresolution optical spectrophotometry and the new MARCS stellar atmosphere models to determine the effective temperatures of 74 red supergiants (RSGs) in our galaxy, 39 RSGs in the Small ... 
The effects of configuration interaction on the hyperfine structure
(Massachusetts Institute of Technology, 1951) 
Effects of control error on an adiabatic quantum algorithm
(Massachusetts Institute of Technology, 2006)Noise in adiabatic quantum computation can be modelled as a perturbation of the problem Hamiltonian. For a type of noise called control error, the perturbation can be considered to have the same structure as the problem ... 
Effects of electrode surface roughness on motional heating of trapped ions
(Massachusetts Institute of Technology, 2016)Electric field noise is a major source of motional heating in trapped ion quantum computation. While the influence of trap electrode geometries on electric field noise has been studied in patch potential and surface adsorbate ... 
Effects of grain boundary structure on diffusion along [001] tilt boundaries in the Au/Ag system
(Massachusetts Institute of Technology, 1991) 
The effects of inelastic selfinteracting dark matter on galactic halo properties v/
(Massachusetts Institute of Technology, 2018)Selfinteracting dark matter, which serves as an alternative to collisionless cold dark matter, may be useful for solving the smallscale galaxy formation problems present in the LambdaCold Dark Matter model. So far, most ... 
Effects of interaction in BoseEinstein condensates
(Massachusetts Institute of Technology, 2006)This thesis discusses a series of studies that investigate the effects of interaction  essentially the swave scattering  in the various properties of BoseEinstein condensates (BEC). The phonon wavefunction in a BEC was ...