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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Spectral Function"”.
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Analysis of JLab E12-14-012 Ti(e,e′p) Data and Determination of the Ti Spectral Function
… range of kinematics in order to determine the spectral function of protons and neutrons in Argon. The measurements made in E12-14-012 are the first of their kind in argon and are a pivotal step in understanding the electron-Argon interaction and its relation to neutrino scattering. Titanium was …
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Charmonium correlation and spectral functions in quenched lattice QCD at finite temperature
… effects in the charmonium correlators and spectral functions. In particular, our finest lattices have a very small lattice spacing, i.e. $a=0.01$ fm. Using the Maximum Entropy Method we have reconstructed the spectral functions at both temperature below and above the critical temperature. …
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Half-bound states of a one-dimensional Dirac system: their effect on the Titchmarsh-Weyl M([lambda])-function and the scattering matrix
… half-hound states on the Titchmarsh-Weyl M(λ)· function and the S-matrix for a one dimensional Dirac system. For short range potentials with finite first (absolute) moments, we gave an M(λ) characterization of half bound states and, as a corollary, we deduce the behavior of the spectral function …
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Hadronic matter: from vacuum to extreme temperature in the presence of magnetic fields
… (DV), using the vector and axial-vector hadronic spectral function from tau-decay. A pinched integration kernel is introduce in the FESR in order to quench potential duality violations on the real axis in the complex squared energy plane and effectively extend the analysis well beyond the …
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Beyond Color: Lattice Gauge Theory for Strongly-Coupled Physics
… to better understand said theories. First, the spectral function reconstruction problem in LGT is considered, and a new method for spectral function reconstruction in LGT is presented. Spectral functions describe the energy states of a theory: bound states, resonances, and continuum thresholds. …
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Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES
… $\rho$ mass approach and in-medium $\rho$ spectral function modifications, favor the latter.
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Ab initio calculations of phonon properties and spectra in condensed matter
… contributions the electron self–energy and spectral function, vibrational free energy, thermal expansion, and heat capacity.
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The gluon self-energy in cavity quantum chromodynamics
… is expressed as the integral of a divergent spectral function, from which the divergence may be extracted by analogy to the free space expression. It is shown for the case of the self-energy of a gluon in a cavity that no new divergences arise due to the presence of the boundary, provided …
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Magnetic-field-induced antiferromagnetism in the Kondo lattice
… stability down to arbitrarily low temperatures. Spectral data is extracted from the imaginary-time correlation functions using an improved analytic continuation technique. The weak, secondary peaks of the single-electron spectral function are resolvable, and their response to the magnetic field …
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Statistical analysis of low level atmospheric turbulence
… of each block in the time series. The smoothed spectral density estimates have been obtained by using cosine tapering data window in the time domain and applying combined frequency smoothing technique in the frequency domain. A fast Fourier transform algorithm requiring a no-bit reversal …
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Measurement of electron-electron interactions in one dimension with tunnelling spectroscopy
… dispersion is approximated as a linear function. Consequently, the Luttinger liquid model is limited in its scope of applicability. Specifically, it is valid only in the vicinity of the Fermi points, where the excitation energy is low. Recent advancement in the theoretical field has …
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A SANS study of the interfacial curvatures and the phase behavior in bicontinuous microemulsions
… wave model with an inverse 8th order polynomial spectral function. The spectral density function contains three basic length scales : the inter-domain distance, the coherence length, and the surface roughness parameter. These three length scales are essential to describe mesoscopic scale …
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Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012
… electron-nucleus cross section and thus derive a spectral function for argon that can be used with neutrino experiments. The use of titanium in this experiment stems from the equivalent shell structure that its protons share with the neutrons in argon, which will be crucial in oscillation …
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The influence of coulomb potential fluctuation on c-axis tunneling in cuprates
… high-temperature superconducting materials as a function of temperature. A point-to-point tunneling model is built to describe the tunneling between two CuO2 planes including the in-plane Coulomb interaction. With a general assumption that the spectral function of the Coulomb uctuation is ohmic, …
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Conductance of single-electron devices from imaginary-time path integrals
… expression for the current autocorrelation function <br>which can be related to the conductance using linear response <br>theory. To circumvent the dynamical sign problem in the numerical <br>determination of real-time correlation functions, we calculated <br>the current autocorrelator for …
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Angle-resolved photoemission studies of two-dimensional electron systems
… spectroscopy, which can directly measure the spectral function of the quasiparticle. The study of ultrathin metallic films focuses on the substrate effect on the electronic structure of the film. Thin metallic films can support quantum well states, which are essentially electronic standing …
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Across the Scales of the Nucleus: Understanding Short Range Correlations from Medium Modification to Probe Independence
… to the high-momentum tail of the nuclear spectral function. While the low-momentum region is characterized by nucleons exhibiting bulk properties, nucleons begin to pair into SRCs at higher momenta. Our research aims to bridge the understanding between the mean-field portion of the nucleus …
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Heat trace and heat content asymptotics for Schrodinger Operators of stable processes/fractional Laplacians
… expansion as <em>t</em> ↓ 0 of the following spectral functions for smooth bounded domains Ω ⊂ <strong>R</strong><em><sup> d</sup></em>, [special characters omitted] where <em>p</em>(Ω,α/<em> t</em>)(<em>x, y</em>) is the transition density of a stable process killed upon exiting Ω. ^ The …
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Experimental consequences of mottness in high-temperature copper-oxide superconductors
… this dissertation. In Chapter 4, we compute the spectral function of the two-dimensional Hubbard model using CDMFT and study the origin of the kink feature observed in the electron dispersion measured by ARPES (Angle Resolved Photoemission Spectroscopy). In Chapter 5, the origin of the mid-IR …
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Renewable energy supply and storage: liquid metal battery stability
… coupled 3-layer numerical model based on the spectral function representation has been developed. It is well suited for analysis of the following situations: interaction of the background melt flow and the interface deformations, for the spatially complex, time-dependent distribution of the …
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