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Showing 1 to 20 of 124 for “"bound states"”.
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Soliton interactions and bound states
… is concerned with soliton interactions and bound states. We consider a on-topological soliton in (1 + 1) dimensions and topological models in (2 + 1) and (3 + 1) dimensions. In chapter 2 we consider Qballs, which are non-topological solitons, in (1 + 1) dimensions. Here we note the …
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Theoretical models of many-quark bound states
… to calculate the properties of many-fermion bound states. The quark implementation of MFD (MFDq) was extensively tested on the 2-body problem against the established nucleon implementation of MFD (MFDn). We were able to perform a limited set of self-consistency checks of MFDq in the 4-body …
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Observation of mechanical bound states in the continuum
… we propose a new cavity-less system based on bound states in the continuum (BICs), which are non-radiative states that can coexist with radiation waves inside the continuum region can offer a platform for realizing phonon trapping without mechanical suspension. In-depth characterization of the …
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Bound states in a system of two vector mesons
… relations techniques, we look for s-wave bound states between two such particles. vIe find three bound states in the 1.2 BeV region. These have the IJ PG assignments: 02++, 11++ and 00'1-+, \ve identify the f and the B .. resonances with the first Bnd the second of these states. There are …
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Mechanical bound states in the continuum in phononic crystals
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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High frequency bound states in nonlinear Schr¨odinger equations
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
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The bound states of Dirac equation with a scalar potential
"We study the bound states of the 1+1 dimensional Dirac equation with a scalar potential, which can also be interpreted as a position dependent ""mass'', analytically as well as numerically. We derive a Prüfer-like representation for the Dirac equation, which can be used to derive a condition for …
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Quasiparticle bound states in normal metal/superconductor structures probed by scanning tunneling microscopy
… superconductivity will support quasiparticle bound states, which can be measured spectroscopically. Using a custom-built cryogenic scanning tunneling microscopy system, we have probed the bound states of an NS system consisting of Au (N) droplets of nanometer dimensions in electrical contact …
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Bound states of heavy and light quarks in the framework of quantum chromodynamics
… obtained in the fit to experimentally known states is compared with the result expected from the hyperfine splitting of the D and B mesons. It appears that tris ratio is model dependent. More experimental data are required to further evaluate the validity of this model.
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Perturbation theory of two particle bound states in QED for particles of spin ��� 1
In this paper we present a generalization of Salpeter's approach to solving the Bethe-Salpeter equation for the hydrogen atom to the case of any two particles of spin ≤ 1. In order to preserve the same general form of Salpeter's scheme the Kemmer-Duffin equations are used to describe the spin 1 or …
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Microwave Spectroscopy and Transport Measurements of Andreev Bound States in Superconductor – Semiconductor Josephson Junctions
… inherent to semiconducting devices and Andreev bound states are the microscopic states which mediate transport through these junctions. In this thesis a series of experiments aimed at understanding Andreev bound states in Josephson junction devices are presented. RF reflectometry measurements of …
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Optical bound states in the radiation continuum : from topological charges to light-emission applications
Bound states in the continuum (BICs) are unusual solutions of wave equations describing light or matter: they are discrete and spatially bounded, but exist at the same energy as a continuum of states which propagate to infinity. In this thesis, we will explore optical BICs from different …
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Perturbation Theory of Two Particle Bound States in Qed for Particles of Spin l.e. 1
Made available in DSpace on 2015-05-12T22:38:46Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7212276.PDF: 1798069 bytes, checksum: 9fc3a98b6dcf1dd9e749159675c599cf (MD5) Previous issue date: 1971
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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
We study the effect of the so-called 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 …
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Asymptotic Stability of the Ground States of the Nonlinear Schrodinger Equation
… study the asymptotic stability of the nonlinear bound states, i.e. periodic in time localized in space solutions. Our result shows that all solutions with small initial data, converge to a nonlinear bound state. Therefore, the nonlinear bound states are asymptotically stable. The proof hinges on …
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Spectral properties of relativistic and non-relativistic Krönig- Penney Hamiltonians with short-range impurities
… of both spectra is that they have gaps and that bound states may occur in such gaps as a consequence of the presence of the short-range potential representing the impurity. Such bound states, often called "impurity states" in the solid state physics literature. are important with regard to the …
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Initial Conditions for Cosmic Inflation, the History of the Dark Sector, and Dark-Onium
… (WIMP) dark matter generically possesses bound states when the WIMP mass becomes sufficiently large relative to the mass of electroweak gauge bosons. After a review of the treatment of bound states in quantum electrodynamics, this thesis examines the formation and decay of bound states for …
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Rotational Symmetry and Phase Dynamics in Topological Superconductors
… tied to topological superconductors are Majorana bound states. These are neutral zero-energy quasiparticles, localised to boundaries or defects, that are highly sought after as ingredients for quantum computation. In the first part of this thesis, we consider two-dimensional crystalline …
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Topological semimetals and nodal superconductors
… Hamiltonians. We discuss a generalized bulk-boundary correspondence, which relates the topological properties in the bulk of gapless topological phases and the protected zero-energy states at the boundary. We study examples of gapless topological phases, focusing in particular on nodal …
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