Browsing Vitenskapelige publikasjoner (IMF) by Title
Now showing items 172-185 of 185
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Towards dielectric relaxation at a single molecule scale
(Peer reviewed; Journal article, 2022)Dielectric relaxation lies at the heart of well-established techniques of dielectric spectroscopy essential to diverse fields of research and technology. We report an experimental route for increasing the sensitivity of ... -
Towards learning optimized kernels for complex Langevin
(Peer reviewed; Journal article, 2023)We present a novel strategy aimed at restoring correct convergence in complex Langevin simulations. The central idea is to incorporate system-specific prior knowledge into the simulations, in order to circumvent the NP-hard ... -
Towards the nucleon hadronic tensor from lattice QCD
(Peer reviewed; Journal article, 2020-06)We present the first calculation of the hadronic tensor on the lattice for the nucleon. The hadronic tensor can be used to extract structure functions in deep inelastic scatterings and to provide information for neutrino-nucleon ... -
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 ... -
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 ... -
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 ... -
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 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 ...