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Showing 1 to 9 of 9 for “"Berry's phase"”.
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Two applications of Berry's phase in fermionic field theory
… configurations. In this thesis, two examples of Berry's geometrical phase in a fermionic sea are studied: the anomalous commutator in gauge field theory and the intrinsic orbital angular momentum in superftuid 3He-A. Chapter 1 is a brief introduction. Chapter 2 reviews Berry's Phase and several …
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Two applications of Berry's phase in fermionic field theory
… configurations. In this thesis, two examples of Berry's geometrical phase in a fermionic sea are studied: the anomalous commutator in gauge field theory and the intrinsic orbital angular momentum in superfluid $\sp3$He-A.
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Black holes and Berry's phase : some aspects of geometry in physics
… first focus attention on the occurrence of the Berry phase in certain situations. This gives some insight into the geometry of quantum mechanics. Then we turn our attention to the analysis of quantum fields in black hole spacetimes. This brings us to the renormalisation of the stress- tensor via …
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Anomalous Hall Effect in Calcium -Doped Lanthanum Cobaltite and Gadolinium
… in fields up to 7 T. The Gd results suggest that Berry's phase contributes partially to the Hall effect near TC. Berry's phase theories hold promise for explaining the large anomalous Hall effect in La1-xCaxCoO3 near T C, but the material presents many additional complexities, including a unique …
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Line bundles and integrality conditions in quantum mechanics and quantum field theory
… anomalies and other related topics including Berry's phase are discussed.
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Probing the topology in band insulators
… is a newly found state of matter. Unlike phases described by the traditional Landau theory of symmetry breaking, the topological phases do not break symmetry, and it is not obvious in which measurable quantity will the topological index manifest itself. In this thesis, our main goal is to …
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Accurate Treatments of Electronic Correlation: Phase Transitions in an Idealized 1D Ferroelectric and Modelling Experimental Quantum Dots
… first is a 1D ionic Hubbard model with a complex phase diagram that we find to exhibit a ferroeletric \bond ordered"" phase. A new many-body berry's phase formulation of the electronic polarization and localization is used in conjunction with QMC to analyze whether a bond order phase exists …
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Topics in Spin-Orbit Coupling in Cold Atoms and Semiconductors
… a charge- density wave characterized by a π/2-phase shift and a non-monotonic time-varying amplitude. The optimal values of spin-orbit coupling for observation of the effect are determined. We propose a scheme for using atom interferometry to measure weak time- dependent accelerations. This …
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Mesoscopic quantum interference experiments in InGaAs and GaAs two-dimensional systems
… to the single ring interferometer to study the Berry's phase and the Aharonov-Casher effect. The ring interferometer array yields both AB oscillations and Altshuler-Aronov-Spivak (AAS) oscillations, the latter with magnetic flux periodicity of h/2e. The AAS oscillations require time-reversal …