Department of Mathematics and Physics (TN-IMF)
Collections in this community
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PhD theses (TN-IMF) [19]
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Studentoppgaver (TN-IMF) [122]
Master- og bacheloroppgaver i matte og fysikk
Recent Submissions
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The unitary Fermi gas at large charge and large N
(Peer reviewed; Journal article, 2024)We study the unitary Fermi gas in a harmonic trapping potential starting from a microscopic theory in the limit of large charge and large number of fermion flavors N. In this regime, we present an algorithmic procedure for ... -
On the generality of energy conservation within the theory of general relativity
(Master thesis, 2024) -
An introduction to nuclear reactor analysis
(Bachelor thesis, 2024) -
Numerical studies of out-of-equilibrium processes in the early universe
(PhD thesis UiS; 834, Doctoral thesis, 2025)This thesis presents efforts to better understand out-of-equilibrium processes in the early universe. Although most of the time the universe was in thermal equilibrium, out-of-equilibrium processes are an important aspect ... -
Abdeldaim, A.H., Gretarsson, H., Day, S.J. et al. (2024) Kitaev interactions through extended superexchange pathways in the jeff=1/2 Ru<sup>3+</sup> honeycomb magnet RuP<inf>3</inf>SiO<inf>11</inf>
(Peer reviewed; Journal article, 2024)Magnetic materials are composed of the simple building blocks of magnetic moments on a crystal lattice that interact via magnetic exchange. Yet from this simplicity emerges a remarkable diversity of magnetic states. Some ... -
A Search Using GEO600 for Gravitational Waves Coincident with Fast Radio Bursts from SGR 1935+2154
(Peer reviewed; Journal article, 2024)The magnetar SGR 1935+2154 is the only known Galactic source of fast radio bursts (FRBs). FRBs from SGR 1935+2154 were first detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB and the Survey for ... -
On a Uniqueness Property of n-th Convolutions and Extensions of Titchmarsh Convolution Theorem
(Peer reviewed; Journal article, 2024)This note is an attempt to present a brief story of how a question of Kolmogorov on Gaussian measures had led to an number of function-theoretic results obtained mostly by Ostrovskii and some of his students. It is intended ... -
Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory
(Peer reviewed; Journal article, 2024-01)We compute the heavy quark momentum diffusion coefficient 𝜅 using QCD kinetic theory for a system going through bottom-up isotropization in the initial stages of a heavy ion collision. We find that the values of 𝜅 are ... -
Estimating false alarm rates of sub-dominant quasi-normal modes in GW190521
(Peer reviewed; Journal article, 2024)A major aim of gravitational wave astronomy is to test observationally the Kerr nature of black holes. The strongest such test, with minimal additional assumptions, is provided by observations of multiple ringdown modes, ... -
Left-invariant pseudo-Riemannian metrics on Lie groups: The null cone
(Peer reviewed; Journal article, 2024-12)We study left-invariant pseudo-Riemannian metrics on Lie groups using the moving bracket approach of the corresponding Lie algebra. -
Kiselman minimum principle and rooftop envelopes in complex Hessian equations
(Peer reviewed; Journal article, 2024)We initiate the study of m-subharmonic functions with respect to a semipositive (1, 1)-form in Euclidean domains, providing a significant element in understanding geodesics within the context of complex Hessian equations. ... -
Heavy quark diffusion coefficient during hydrodynamization - non-equilibrium vs. equilibrium
(Peer reviewed; Journal article, 2024-02)We compute the heavy quark momentum diffusion coefficient using effective kinetic theory for a system going through bottom-up isotropization until approximate hydrodynamization. We find that when comparing the nonthermal ... -
Den matematiske bakgrunnen til LLM
(Master thesis, 2024)In late 2022, OpenAI released ChatGPT to the public, a Large Language Model that could solve a plethora of tasks through the use of text-based inputs. However, despite the immense popularity of ChatGPT, most people do not ... -
Grafteori: Hamiltonske sykler og den reisendes selgers problem
(Master thesis, 2024) -
Nevrale Nettverk og Matematikken bak Kunstig Intelligens (- og bruk av ChatGPT i skolen)
(Master thesis, 2024)Denne oppgaven ser på nevrale nettverk og kunstig intelligens (KI), og hvordan elever bruker ChatGPT i skolen. Nevrale nettverk er inspirert av menneskehjernen og har vært viktige i KI siden 1940-tallet. Studien forklarer ... -
Comparative study of quarkonium transport in hot QCD matter
(Peer reviewed; Journal article, 2024-04)This document summarizes the efforts of the EMMI Rapid Reaction Task Force on “Suppression and (re)generation of quarkonium in heavy-ion collisions at the LHC”, centered around their 2019 and 2022 meetings. It provides a ... -
Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M⊙ Compact Object and a Neutron Star
(Peer reviewed; Journal article, 2024)We report the observation of a coalescing compact binary with component masses 2.5–4.5 M⊙ and 1.2–2.0 M⊙ (all measurements quoted at the 90% credible level). The gravitational-wave signal GW230529_181500 was observed during ... -
Utvikling og optimalisering av LC/MS-MS metode for kvantifisering av 11-ketotestosteron i plasma fra atlantisk laks.
(Master thesis, 2024)En studie ble gjennomført for å optimalisere et derivatiseringsreagens for derivatisering av 11-ketotestosteron (11-KT), som ble analysert ved bruk av væskekromatografi – koblet til massespektrometri (LC/MS-MS). 11-KT er ... -
Bayesian analysis of signals
(Master thesis, 2024)Extracting information from signals can be posed as an inverse problem. Since inverse problems are generally ill-posed, the problem is cast in a Bayesian setting. The objective is three-fold: First, estimation of the ... -
Stochastic Analysis and Differential Geometry with Applications to Stochastic Volatility Models in Finance
(Master thesis, 2024)The thesis explores the interplay between stochastic analysis, differential geometry, partial differential equations (PDEs), and their applications in financial mathematics. It begins by establishing the fundamentals of ...