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.
Results
Showing 1 to 9 of 9 for “"Quantum vortex"”.
-
On quantum vortex reconnections
The thesis analyzes the phenomenon of quantum reconnections in superfluids, in particular in Bose–Einstein condensates, governed by the Gross–Pitaevskii Equation (GPE). The investigation is applied to two distinct settings. First we study the reconnection between an inclined vortex ring and a …
-
Some properties of the magnetic response of mesoscopic superconducting rings
… we focus our attention on the topic of the half- quantum vortex. Such an object can exist in systems with spin triplet pairing in which the equal-spin-pairing state is realized. This state is found in the A-phase of 3 He and is currently believed to describe superconductivity of a strongly layered …
-
New features in the phase diagrams of the cuprate high-Tc superconductors mapped using strong magnetic fields
… temperatures, we reveal an unconventional quantum vortex matter ground state hosting quantum oscillations. This vortex matter ground state is highly resilient to applied magnetic field, but fragile to applied temperature and current. It is characterised by vanishing electrical resistivity, …
-
Explorations of domain walls and half quantum vortices in unconventional superconductors
… superconductors have been proposed to host half quantum vortices, whereas superconductors with spontaneously broken time-reversal symmetry are proposed to admit domain walls that separate regions of opposing chirality. Thus--in addition to conventional vortices--the topological structure of the …
-
Geometry and topological phase of matter
… effective field theories of isotropic-nematic quantum phase transitions of Quantum states. The low-energy theory of the nematic field has z=2 dynamics due to a Berry phase of the order parameter, which is related to the Hall viscosity in parity and time-reversal-symmetry (TRS) broken states. …
-
Excitations in superfluids of atoms and polaritons
… this thesis and justified in the context of the quantum many-body problem. For high occupation numbers and when neglecting quantum fluctuations the quantum field operator simplifies to a semiclassical wave. It turns out that the interparticle interactions can be simplified to a single parameter, …
-
Fermi Surfaces and Where to Find Them: Quantum Oscillations in Kondo Insulators and High-Temperature Superconductors
… physical properties of metals, and have made quantum oscillations, the experimental manifestation of the Fermi surface, a hallmark signature of metals. In this thesis we have studied systems that are distinctly non-Fermi liquid, and discovered that, contrary to this canon, quantum oscillations …
-
Investigation of half-quantized fluxoid states in Sr2RuO4 mesoscopic superconducting rings
… objects, such as chiral edge currents and half-quantum vortices (HQVs) characterized by the nontrivial winding of the spin structure. In this dissertation, we present cantilever magnetometry measurements performed on mesoscopic samples of Sr2RuO4, a spin-triplet superconductor. Satisfying the …
-
Dynamics and properties of massive quantum vortices in binary mixtures of Bose-Einstein condensates
L'abstract è presente nell'allegato / the abstract is in the attachment