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 80 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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Synthesis of linear copolymers and of polymer brushes substituted with spiropyran groups : a step towards light driven molecular walkers
… of the macromolecules due to the change in dipole-dipole/dipole-substrate interactions by means of light, following a segment and soldier principle. Scanning force microscopy (SFM) was used to image the different polymer brushes. So far, no light-induced conformational changes were observed …
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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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