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 20 of 77 for “"dipole-dipole"”.
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Phase Transitions in Dipole-Dipole Interacting Atomic Systems
… transitions of atomic systems with interparticle dipole-dipole interaction controlled by laser fields are studied. In the first half of the thesis, a system with externally polarized dipole molecules at half-filling moving along a one-dimensional zigzag chain is studied, including groundstate …
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Dipole-Dipole Interactions in Alkali Halides Doped with Hydroxyl
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2011-06-10T16:27:13Z No. of bitstreams: 1 1981_potter.pdf: 3658463 bytes, checksum: 3b170f5a7503b36a6d1012bd8b556457 (MD5)
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Resonant Dipole-Dipole Energy Transfer Dynamics in a Frozen Rydberg Gas
<p>The dipole-dipole interaction strongly couples ultracold highly excited atoms, known as Rydberg atoms, and is the dominant mechanism for energy exchange among such atoms on microsecond time scales. I present the results of experiments that investigate this interaction using rubidium atoms …
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Super-resolution Control of Ultracold Dipolar Atoms on a 50-nm Scale
… large spin degree of freedom and long-range dipole-dipole interactions. In this thesis, following an introduction to the fundamental properties of Dy, we introduce the design and construction of an experimental apparatus that is capable of producing Bose-Eintein codensates of more than 10⁵ Dy …
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Investigating the Performance Of Electrical Resistivity Arrays
… were used to investigate performance of the dipole-dipole, pole-dipole, pole-pole, Wenner and Schlumberger arrays Although the synthetic, noise-free data were well matched for all inversions, many of the inversion results exhibit substantial mismatches from the true model. The greatest …
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Magnetic Excitations in Cylindrical Multilayered Nanostructures
… is given for magnetostatic modes, where the dipole-dipole interactions dominate in the SW dynamics. The magnetostatic form of Maxwell's equations and electromagnetic boundary conditions are used to derive the SW dispersion relations in nanotubes. A transfer matrix formalism is subsequently …
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CHARACTERIZATION AND DELINEATION OF POTENTIAL EVAPORITE GEOHAZARDS USING ELECTRICAL RESISTIVITY METHODS ALONG FM 2185, CULBERSON COUNTY, TEXAS
… OhmMapper G-858 resistivity system, which uses a dipole-dipole configuration composed of five receivers connected by 2.5-meter coaxial cables and a transmitter offset of 2.5 meters. In combination with the medium analyzed, this geometric configuration enabled resistivity soundings up to 5 meters …
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From Static Potentials to High-Energy Scattering
… model for a unified description of static color dipole potentials, confining QCD strings, and hadronic high-energy reactions with special emphasis on saturation effects manifesting S-matrix unitarity at ultra-high energies. The model combines perturbative gluon exchange with the non-perturbative …
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Theory of phase transitions in liquid crystals and plastic crystals
… of freedom within each smectic plane. McMillan's dipole-dipole interaction model is extended to include intermolecular repulsions. In the self-consistent field approximation there are three ordered phases: the smectic C phase in which molecules are rotationally ordered but free to translate …
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NMR relaxation studies of liquids in confined geometries
… mechanisms dominating the relaxations include dipole-dipole, quadrupole, and spin-rotation interactions. Pressure and temperature have been used as variables in the studies for enriching the experimental results.
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Chiral Separations on HPLC Derivatized Polysaccharide CSPs: Temperature, Mobile Phase and Chiral Recognition Mechanism Studies
… chiral cavities of the CSP, as well as pi-pi, dipole-dipole, and additional hydrogen bonding interactions between analyte and CSP; and (3) chiral discrimination between enantiomer analytes arising from the additional hydrogen bond between analyte and CSP. For Chiralcel OD, the chiral …
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Quantum simulations in interacting Rydberg synthetic dimensions
… Leveraging the strong, long-range, and tunable dipole-dipole interactions between Rydberg atoms, this approach significantly extends the capabilities of synthetic dimensions into the strongly interacting regime, enabling the exploration of quantum many-body phenomena beyond the reach of …
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Structure-Morphology-Property Relationships in Perfluorosulfonic Acid Ionomer Dispersions, Membranes, and Thin Films to Advance Hydrogen Fuel Cell Applications
… of dispersions, membranes, and thin films. Dipole-dipole interactions between colloidal aggregates modulated by solvent composition were found to significantly influence the viscosity of PFSA dispersions. A framework of PFSA-solvent interactions is developed to predict the onset of …
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Fluorescence Resonance Energy Transfer (FRET) systems for biomedical sensor applications
… by which energy is transferred, via long range dipole-dipole interactions, from a donor molecule (D) in an excited electronic state to an acceptor molecule (A). The emission band of D must overlap the absorption band of A in order for FRET to occur. FRET is employed in a variety of biomedical …
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Dipolar Shielding and Sub-wavelength Bilayers in a Quantum Gas of Dysprosium
… of research for dipolar physics. Since the dipole-dipole interaction scales as 1/𝑟3, the reduction in interlayer separation leads to an approximately 500x enhancement of the dipole-dipole interaction. With our new subwavelength tool we explored dipolar coupling across the layers by observing …
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Millimeter-wave dynamics and control of Rydberg-Rydberg transitions
… indicating the presence of quantum many-body dipole-dipole effects in the cooperative emission. Additionally, the smaller lab-frame velocity reduces the Doppler broadening enough to allow for coherent manipulation of Rydberg states and a coherent coupling of an optical and millimeter-wave …
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Control of Exciton Photon Coupling in Nano-structures
… interaction in microcavity structures, direct dipole-dipole interactions, and plasmon-exciton interaction in metal-semiconductor systems. </p> <p>In the microcavity structures, the light-matter interactions become significant when the excitonic energy is in resonance with microcavity photons. …
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Quantum liquid crystal phases and unconventional magnetism in electronic and atomic fermi systems
… systems and itinerant Fermi systems with dipole-dipole interactions. It is based on published works of Refs. [65, 193, 68, 67, 66]. In the first part of the Thesis, I present the construction of a generalization of the the McMillan- de Gennes theory of nematic-smectic thermal phase …
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Characterization and Delineation of Karst Geohazards Along RM652 Using Electrical Resistivity Tomography, Culberson County, Texas
… multi-electrode earth resistivity meter with a dipole-dipole array type. Resistivity data collected was processed using EarthImager 2D to produce inverted profile sections of each site. Two dimensional electrical resistivity tomography was shown to be effective in detecting karst features in the …
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