Blar i Department of Mathematics and Physics (TN-IMF) på tittel
Viser treff 278-294 av 294
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Transmission in pseudospin-1 and pseudospin-3/2 semimetals with linear dispersion through scalar and vector potential barriers
(Peer reviewed; Journal article, 2020-09)We investigate the tunneling of pseudospin-1 and pseudospin-3/2 quasiparticles through a barrier consisting of both electrostatic and vector potentials, existing uniformly in a finite region along the transmission axis. ... -
Transport Properties of Superfluid Phonons in Neutron Stars
(Peer reviewed; Journal article, 2021-03)We review the effective field theory associated with the superfluid phonons that we use for the study of transport properties in the core of superfluid neutrons stars in their low temperature regime. We then discuss the ... -
Transversality, Intersection Theory and Sheaf Theory
(Master thesis, 2023)In this thesis we present the theory of transversality and intersection theory on manifolds. Thereafter we present the theory of sheaves with the goal of using sheaf theory on manifolds together with intersection theory ... -
Tunneling in Fermi systems with quadratic band crossing points
(Peer reviewed; Journal article, 2020-08)We investigate the tunneling of quasiparticles through a rectangular potential barrier of finite height and width, in 2d and 3d semimetals with band structures consisting of a quadratic band crossing point. We compute the ... -
Two-flavor chiral perturbation theory at nonzero isospin: Pion condensation at zero temperature
(Journal article; Peer reviewed, 2019-10)In this paper, we calculate the equation of state of two-flavor finite isospin chiral perturbation theory at next-to-leading order in the pion-condensed phase at zero temperature. We show that the transition from the vacuum ... -
Uniform Sampling of Band-limited Signals
(Masteroppgave/UIS-TN-IMF/2019;, Master thesis, 2019-06-15)This master thesis presents a short introduction into the field of sampling of functions of one variable. It is not meant to come up with any new theory, just to give an overview over known material, and to prove most of ... -
Universal Black Holes
(Peer reviewed; Journal article, 2020-02)We prove that a generalized Schwarzschild-like ansatz can be consistently employed to construct d-dimensional static vacuum black hole solutions in any metric theory of gravity for which the Lagrangian is a scalar invariant ... -
Universal p-form black holes in generalized theories of gravity
(Peer reviewed; Journal article, 2020-10)We explore how far one can go in constructing d-dimensional static black holes coupled to p-form and scalar fields before actually specifying the gravity and electrodynamics theory one wants to solve. At the same time, we ... -
Universal spacetimes in four dimensions
(Journal article; Peer reviewed, 2017-10)Universal spacetimes are exact solutions to all higher-order theories of gravity. We study these spacetimes in four dimensions and provide necessary and sufficient conditions for universality for all Petrov types except ... -
Unveiling the gravitational universe at μ-Hz frequencies
(Peer reviewed; Journal article, 2021)We propose a space-based interferometer surveying the gravitational wave (GW) sky in the milli-Hz to μ-Hz frequency range. By the 2040s, the μ-Hz frequency band, bracketed in between the Laser Interferometer Space Antenna ... -
Value regions of univalent self-maps with two boundary fixed points
(Journal article; Peer reviewed, 2018)In this paper we find the exact value region V(z0,T) of the point evaluation functional f → f(z0) over the class of all holomorphic injective self-maps f : D → D of the unit disk D having a boundary regular fixed point at ... -
Veier i Grafer
(Bachelor thesis, 2022)I denne teksten skal vi se på grunnleggende grafteori, hovedsakelig Eulers grafteori og tilstrekkelige Hamilton-kriterier, hvor vi kommer til å gå mer i dybden på egenskapene deres og hvordan de kan bli implementert innenfor ... -
Veier i Grafer
(Bachelor thesis, 2022)I denne teksten skal vi se på grunnleggende grafteori, hovedsakelig Eulers grafteori og tilstrekkelige Hamilton-kriterier, hvor vi kommer til å gå mer i dybden på egenskapene deres og hvordan de kan bli implementert innenfor ... -
Weakly interacting dark matter miracle
(Bachelor thesis, 2022)Dark matter is currently actively searched for in particle physics. In this thesis the weakly interacting massive particles (WIMPs) are looked at as possible dark matter candidates. The thesis focus on the mechanism called ... -
Wick-rotations of pseudo-Riemannian Lie groups
(Peer reviewed; Journal article, 2020)We study Wick-rotations of left-invariant metrics on Lie groups, using results from real GIT (Helleland and Hervik, 2018; Helleland and Hervik, 2019). An invariant for Wick-rotation of Lie groups is given, and we describe ... -
X-ray Studies on partially decomposed γ- Mg(BH4)2
(Masteroppgave/UIS-TN-IMF/2020;, Master thesis, 2020-07-15)Hydrogen is the energy that fuels the sun and the stars. Having the potential to be zero-carbon during production, when produced by renewable resources, it is an attractive carrier of the pollution-free renewable energy. ... -
X‐ray and Synchrotron FTIR Studies of Partially Decomposed Magnesium Borohydride
(Peer reviewed; Journal article, 2022)Magnesium borohydride (Mg(BH4)2) is an attractive compound for solid-state hydrogen storage due to its lucratively high hydrogen densities and theoretically low operational temperature. Hydrogen release from Mg(BH4)2 occurs ...