Sökning: "hermitian form"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden hermitian form.

1. 1. The Dirac Operator; From Numerics to the Theory of G-convergence

   Författare :Hasan Almanasreh; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Dirac operator; spuriousity; cubic Hermitian; stability parameter; G-convergence; ¡-convergence; spectral measure; quadratic form; stability parameter;

   Sammanfattning : We consider two main issues concerning the Dirac operator, the first is widely known as the appearance of spurious eigenvalues within the spectrum. The second is the study of the asymptotic behavior of the eigenvalues for a family of Dirac operators with oscillatory potential added to the Coulomb-Dirac Hamiltonian. LÄS MER

3. 2. On Quaternionic Shimura Surfaces

   Författare :Håkan Granath; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Shimura surface; quaternion order; Clifford algebra; hermitian form; Kodaira classification; Shimura surface; Matematik;

   Sammanfattning : .... LÄS MER

4. 3. Harmonic morphisms, Hermitian structures and symmetric spaces

   Författare :Martin Svensson; Matematik (naturvetenskapliga fakulteten); []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; isotropic subbundles; conformal foliations; holomorphic maps; harmonic morphism;

   Sammanfattning : A harmonic morphism is a map between two Riemannian manifolds with the property that its composition with a local harmonic function on the codomain is a local harmonic function on the domain. Such a map is automatically a harmonic map, satisfying an additional partial conformality condition called horizontal (weak) conformality. LÄS MER

5. 4. Knots and Transport in Topological Matter

   Författare :Marcus Stålhammar; Emil Johansson Bergholtz; Christiane Morais Smith; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Transport; Knots; Topology; non-Hermiticity; Weyl semimetals; Theoretical Physics; teoretisk fysik;

   Sammanfattning : Topology has manifestations in physics ranging from the field of condensed matter to photonics. This dissertation provides a two-fold study on the impact of topology in Hermitian and non-Hermitian band structures. LÄS MER

7. 5. Knotted Nodal Band Structures

   Författare :Marcus Stålhammar; Emil Bergholtz; Edwin Langmann; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; teoretisk fysik; Theoretical Physics;

   Sammanfattning : It is well known that in conventional three dimensional (3D) Hermitian two band models, the intersections between the energy bands are generically given by points. The typical example are Weyl semimetals, where these singular points can be effectively described as Weyl fermions in the low energy regime. LÄS MER