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 9 of 9 for “"fractional charge"”.
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Higher-order crystalline topology in resonator circuits
… a new method for identification - measurement of fractional charge (or fractional mode density). Both focus on rotationally symmetric systems, the first demonstrating that fractional charge manifesting at boundaries can indicate non-trivial higher-order topology, and the second demonstrating that …
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Towards Systematic Improvement of Density Functional Approximations
… formulation of the density functional theory for fractional-charge systems, for which the ground state energy for the exact functional, as a function of the fractional electron number, should yield a series of line-segments across the integer points. In this dissertation, by imposing the PPLB …
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Exploring the interplay between topological order, magnetism and superconductivity
… studied instance of the Josephson effect for charge in superconductors, we investigate properties of the phase-coherent {\it spin} current resulting from the misalignment of the in-plane magnetization angles of the two ferromagnets. We show that the topological insulating barrier offers the …
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Orbital Angular Momentum Microlasers: From The First Demonstration To Ultrafast Tunability
… OAM microlaser of which both the topological charge and the polarization state can be designed on demand. More recently, we successfully promoted the OAM microlaser technology and achieved a dynamically tunable and scalable vortex microlaser, providing 5 different OAM states at the same …
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Interaction effects in quantum interferometers
… to the emergence of quasi-particles with fractional charge and anyonic statistics. Quantum Hall Fabry-Pérot interferometers (FPI) have attracted increasing attention due to their ability to probe such exotic physics. In addition, such interferometers are affected by electron interactions …
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Higher-order topological phases with crystalline symmetries
… corner states and quantized 1/2 electronic charge localized at the corners of the lattice. The topologies in HOTIs are usually protected by crystalline symmetries. In this dissertation, we systematically study the charge fractionalization in 2D HOTIs under rotation symmetries. We find that, …
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Weak interactions and excited states from Coulomb-attenuated DFT
… some key problems facing modern DFT—dispersion, fractional spins and fractional charges—in terms of the force and the Feynman electron density distortion, in addition to the conventional viewpoint of the energy. Two model systems, H2 and H+2 are employed to illustrate how increasing quantities of …
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Artificial gauge fields and quantum hall physics in optical lattices
… and for controlling and probing integer and fractional Chern insulator states and their excitations. The first example is about the implementation of local magnetic fluxes piercing single lattice plaquettes (analogous to those created by a thin solenoid), which plays an important role in …
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Strongly correlated quantum fluids and effective thermalization in non-Markovian driven-dissipative photonic systems
… up to a unitary transformation, and the Fractional Quantum Hall (FQH) effect which occurs in presence of a gauge field, and features a special type of elementary excitation possessing a fractional charge and obeying to fractional statistics called `anyon'. These quantum many-body effects …