Browsing Physics and Astronomy by Title
Now showing items 299318 of 613

Nanoparticleregulated phase behavior of ordered block copolymers
(RSC publishing, 20080630)Although block copolymer motifs have received considerable attention as supramolecular templates for inorganic nanoparticles, experimental observations of a nanostructured diblock copolymer containing inorganic ... 
Nanoscale physics of surfactant gene delivery
(University of Waterloo, 20160118)Medicine has met a revolution in the expansion of possibilities for therapy based upon synthetic gene delivery. Imagine the ability to correct problems of a genetic origin with a simple drug  such science fiction fantasies ... 
Nanoscale quantum transport for quantum information processing
(University of Waterloo, 20130425)In this thesis, I study quantum transport of electron (e.g., current and noise) in quantum dots exploring microscopic processes responsible for spinrelaxation in double quantum dots in Pauli spin blockade regime. This is ... 
Nanostructures based on cyclic C6
(University of Waterloo, 20130524)The properties of a new family of carbon structures based on stacked cyclic C6 rings and intercalated cyclic C6 structures: (C6)n and (C6)nMen1 have been studied theoretically using ab initio DFT (Density Functional ... 
The Nature and Impact of Active Galactic Nuclei
(University of Waterloo, 20210812)The gravitational interaction around the event horizon of black holes presents theoretical challenges. With the advent of the Event Horizon Telescope (EHT), we are now entering an era in physics where we can probe the ... 
Nematic ordering of wormlike polymers
(University of Waterloo, 2005)In this thesis, based on the Onsager excluded volume interaction model, two nematic ordering problems of wormlike (semiflexible) polymer are studied: one is to investigate the isotropicnematic interface of polymers for ... 
Neural networks and quantum manybody physics: exploring reciprocal benefits.
(University of Waterloo, 20210803)One of the main reasons why the physics of quantum manybody systems is hard lies in the curse of dimensionality: The number of states of such systems increases exponentially with the number of degrees of freedom ... 
Neutron interferometer crystallographic imperfections and gravitationally induced quantum interference measurements
(American Physical Society, 20170125)Dynamical diffraction leads to an interesting, unavoidable set of interference effects for neutron interferometers. This experiment studies the interference signal from two and three successive Bragg diffractions in the ... 
Neutron interferometric measurement of the scattering length difference between the triplet and singlet states of nHe3
(American Physical Society, 20141215)We report a determination of the nHe3 scattering length difference = b = = b = 1 b = 0 = [5.411 = 0.031 (statistical) = 0.039 (systematic)] fm between the triplet and singlet states using a neutron interferometer. This ... 
Neutron Interferometry at the National Institute of Standards and Technology
(Hindawi, 2015)Neutron interferometry has proved to be a very precise technique for measuring the quantum mechanical phase of a neutron caused by a potential energy difference between two spatially separated neutron paths inside ... 
Neutron limit on the stronglycoupled chameleon field
(American Physical Society, 20160311)The physical origin of the dark energy that causes the accelerated expansion rate of the Universe is one of the major open questions of cosmology. One set of theories postulates the existence of a selfinteracting scalar ... 
Neutron Stars, the Exotica  From Modifying General Relativity to Strong Magnetic Fields
(University of Waterloo, 20151222)The gravitational aether theory is a modification of General Relativity that decouples vacuum energy from gravity, and thus can potentially address the cosmological constant problem. The classical theory is distinguishable ... 
New methods in quantum error correction and faulttolerant quantum computing
(University of Waterloo, 20181022)Quantum computers have the potential to solve several interesting problems in polynomial time for which no polynomial time classical algorithms have been found. However, one of the major challenges in building quantum ... 
New Route to Frustration by Quantum ManyBody Effects in the Spin Liquid Pyrochlore Tb$_2$Ti$_2$O$_7$
(University of Waterloo, 20070525)In this thesis we investigate the frustrated spin liquid Tb$_2$Ti$_2$O$_7$ theoretically. The lowenergy effective Hamiltonian of this compound is derived by integrating out the excited crystal field states. It is ... 
New Views on the Cosmological Big Bang
(University of Waterloo, 20170920)This dissertation is a collection of four different proposals to describe the early universe. Each will draw from insights of different areas of physics to suggest a description which differs from the standard inflationary ... 
NMR STUDY OF EXCHANGE AND HYDRATION SITE IDENTIFICATION IN MCM41
(University of Waterloo, 20070116)Deuteron 1D and 2D NMR spectroscopy was used to study the dynamics of water molecules within the mesoporous material MCM41. The deuteron spectra show three magnetization components for a sample hydrated to a 0.2 monolayer ... 
Noise refocusing in a fiveblade neutron interferometer
(AIP Publishing, 20170807)We provide a quantum information description of a proposed fiveblade neutron interferometer geometry and show that it is robust against lowfrequency mechanical vibrations and dephasing due to the dynamical phase. The ... 
NonMarkovianity in Logical Fidelity Estimation
(University of Waterloo, 20210226)As quantum devices are progressively scaled and refined, quantum codes will become indispensable to guarantee reliable computation in the presence of noise. Due to the difficulties of characterizing physical noise, direct ... 
Nonperturbative approaches to Scattering Amplitudes
(University of Waterloo, 20190926)This thesis is devoted to the study of scattering amplitudes using two nonperturbative approaches. In Part I we focus on a particular theory known as N = 4 SuperYangMills in four spacetime dimensions. The scattering ... 
Nonlinear Behavior of Unstable Black Holes in Antide Sitter Spacetimes
(University of Waterloo, 20200925)The nonlinear dynamics of black holes is an increasingly relevant topic of which little is known. In this thesis, we study the full nonlinear dynamics of black holes, as well as their linear behavior, and combine them ...