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.
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Showing 1 to 14 of 14 for “"Multipole Moments"”.
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Electric multipole moments and higher-order topological phases in crystalline insulators and superconductors
… the notion of quadrupole and octupole electric moments. In the presence of certain symmetries, these moments are quantized, and their boundary signatures fractionalized. These higher multipole moments then correspond to new symmetry-protected topological phases (SPTs). A salient signature of …
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Advances in Simulating Binary Black Holes
… has been evidence in the literature that the multipole moments on the common horizon, a set of time-dependent values that quantifies the horizon shape, are described by Kerr perturbation theory. This is a surprising result, since the common horizon forms as the black holes merge. We would …
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Radiation Damage in Permanent Magnet Lenses
… configuration and results in increased multipole moments which degrade the imaging performance. Studies on magnet samples suggest that Samarium Cobalt is at least a thousand times more radiation-tolerant and should be used as a replacement for NdFeB in magnetic lenses for high-dose …
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Multipole Symmetries and Many Body Physics
… which conserve both a total charge and various multipole moments thereof. These conservation laws place constraints on the way in which particles can move, and carry important ramifications for both quantum ground states and non-equilibrium dynamics. Particular emphasis is placed on Hubbard …
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Ab Initio Nuclear Structure Calculations for Light Nuclei
… of observables, such as</p> <p>spectra, radii, multipole moments, transition probabilities, etc., and compare with experiment</p> <p>where available. We obtain underbinding by 0.5 MeV, 0.7 MeV, and 1.0 MeV for 6 Li, 7 Li, 8 Li</p> <p>respectively. Magnetic moments are well-converged and agree …
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Theoretical investigations of the electronic processes in organic photovoltaics
… decreased packing efficiency, and molecular multipole moments all can contribute to changing the HOMO and LUMO levels at the interface by over 0.2 eV, which is large enough to drive apart thermally relaxed charge transfer states at the interface. The work in this thesis provides insight into …
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Theory of Electronic Response to Electromagnetic Fields in Crystalline Solids
… polarization and magnetization fields; from the multipole moments of the macroscopic analogues of these fields, we identify the relevant susceptibility tensors. At various levels of approximation, we show that these general tensors reduce to known results. We also consider the optical response of …
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Measurement of cross section times branching ratio for W boson + photon and Z boson + photon and search for anomalous W boson-photon and Z boson-photon couplings at 1.8 TeV
… <$ 1.2. Limits are placed on electromagnetic multipole moments for both the W and Z bosons using the measured limits of the anomalous couplings, and are presented in this thesis. All of the measurements presented in this thesis are consistent with Standard Model expectations.
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Symmetry and its Signatures in Quantum Many-Body Dynamics
… like charge diffusion, sub(super)-diffusion of multipole moments in systems with short and long-range interactions, charge and multipole, and even measurement-induced phase transitions. By expanding into a doubled Hilbert space, one may capture the subtleties of non-equilibrium physics, and …
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Investigating the effect of charge hydration asymmetry and incorporating it in continuum solvation framework
… Born model. We identify the key electric multipole moments of model water molecules critical for the various degrees of CHA effect observed in studies based on molecular dynamics simulations using different rigid water models. We then use this gained insight to incorporate CHA first into …
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Spektroskopie der Oktupolkorrelationen von 231Pa und 229Pa mit adaptierten Koinzidenzteilchendetektorsystemen
… and led to values for model parameters of multipole moments and deformation. The determination of signs of matrix elements is discussed. Different methods of error analysis were used. The results were related to the experimental known properties of neighbouring nuclei. A comparison of the …
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Conformal symmetries in special and general relativity.The derivation and interpretation of conformal symmetries and asymptotic conformal symmetries in Minkowski space-time and in some space-times of general relativity.
… 8, where we extend the work of Geroch [16] on multipole moments of the Laplace equation in 3-space to the consideration. of Q tý =0 in Minkowski space-time. This development hinges upon the fact that multipole moment fields are also conformal Killing tensors. In the final chapter some …
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Theoretical studies at the interface of atomic physics and precision measurements
… of atomic electrons with a hierarchy of nuclear multipole moments, including magnetic dipole, electric quadrupole, and higher-rank moments. Recently, a determination of the magnetic octupole moment of the $^{173}\mathrm{Yb}$ nucleus was reported from HFS measurements in neutral …
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Optimal Point Charge Approximation: from 3-Atom Water Molecule to Million-Atom Chromatin Fiber
… number of point charges so that the lowest order multipole moments of the reference charge distribution are optimally reproduced. We provide a general framework for calculating OPCAs to any order, and introduce closed-form analytical expressions for the 1-charge, 2-charge and 3-charge OPCA. We …