• Some factors affecting the grades of technology students 

      Gregersen, Øyvind Weiby; Kløkstad, Geir Øivind; Hervik, Sigbjørn; Plesser, Hans Ekkehard; Pettersen, Ivar (Peer reviewed; Journal article, 2017)
      In this study factors that affect the grades of Norwegian technology students have been investigated. The total data set contained 355.706 individual exams from 63 different engineering master programs during the 2010 to ...
    • Spectral function for overoccupied gluodynamics from classical lattice simulations 

      Boguslavski, Kirill; Kurkela, Aleksi; Lappi, Tuomas; Peuron, Jarkko (Peer reviewed; Journal article, 2019)
      We study the spectral properties of an overoccupied gluonic system far from equilibrium. Using classical Yang–Mills simulations and linear response theory, we determine the statistical and spectral functions. We measure ...
    • Spectroscopy for asymmetric binary black hole mergers 

      Abedi, Jahed; Capano, Collin D.; Kastha, Shilpa; Nitz, Alexander H.; Wang, Yi-Fan; Westerweck, Julian; Nielsen, Alex Bentley; Krishnan, Badri (Peer reviewed; Journal article, 2023)
      Black hole spectroscopy is the proposal to observe multiple quasinormal modes in the ringdown of a binary black hole merger. In addition to the fundamental quadrupolar mode, overtones and higher harmonics may be present ...
    • Spontaneous momentum dissipation and coexistence of phases in holographic Horndeski theory 

      Filios, Georgios; Gonzalez, P. A.; Kuang, Xiao-Mei; Papantonopoulos, Eleftherios; Vasquez, Yerko (Peer reviewed; Journal article, 2019)
      We discuss the possible phases dual to the AdS hairy black holes in Horndeski theory. In the probe limit breaking the translational invariance, we study the conductivity and we find a nontrivial structure indicating a ...
    • Stable solvers for real-time Complex Langevin 

      Alvestad, Daniel; Larsen, Rasmus Normann; Rothkopf, Alexander Karl (Peer reviewed; Journal article, 2021-08)
      This study explores the potential of modern implicit solvers for stochastic partial differential equations in the simulation of real-time complex Langevin dynamics. Not only do these methods offer asymptotic stability, ...
    • Static quark-antiquark interactions at nonzero temperature from lattice QCD 

      Bala, Dibyendu; Kaczmarek, Olaf; Larsen, Rasmus Normann; Mukherjee, Swagato; Parkar, Gaurang Yatin; Petreczky, Peter; Rothkopf, Alexander Karl; Weber, Johannes Heinrich (Peer reviewed; Journal article, 2022)
      flavor lattice QCD calculations. The study consists of two parts. The first investigates the properties of Wilson line correlators in Coulomb gauge and compares to predictions of hard-thermal loop perturbation theory. As ...
    • Statistics on Lefschetz thimbles: Bell/Leggett-Garg inequalities and the classical-statistical approximation 

      Tranberg, Anders; Millington, P; Mou, Zonggang; Saffin, Paul M. (Peer reviewed; Journal article, 2021)
      Inspired by Lefschetz thimble theory, we treat Quantum Field Theory as a statistical theory with a complex Probability Distribution Function (PDF). Such complex-valued PDFs permit the violation of Bell-type inequalities, ...
    • Stochastic gravitational wave background from stellar origin binary black holes in LISA 

      Babak, Stanislav; Caprini, Chiara; Figueroa, Daniel G.; Karnesis, Nikolaos; Marcoccia, Paolo; Nardini, Germano; Pieroni, Mauro; Ricciardone, Angelo; Sesana, Alberto; Torrado, Jesús (Peer reviewed; Journal article, 2023)
      We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the ...
    • Stochastic inflation from quantum field theory and the parametric dependence of the effective noise amplitude 

      Andersen, Jens Oluf; Tranberg, Anders; Eriksson, Magdalena Britt (Peer reviewed; Journal article, 2022-02)
      The non-linear dynamics of long-wavelength cosmological fluctuations may be phrased in terms of an effective classical, but stochastic evolution equation. The stochastic noise represents short-wavelength modes that continually ...
    • A study of inhomogeneous massless scalar gauge fields in cosmology 

      Normann, Ben David; Ricciardone, Angelo; Hervik, Sigbjørn; Thorsrud, Mikjel (Peer reviewed; Journal article, 2022)
      Why is the Universe so homogeneous and isotropic? We summarize a general study of a γ-law perfect fluid alongside an inhomogeneous, massless scalar gauge field (with homogeneous gradient) in anisotropic spaces with General ...
    • Supernova constraints on dark flavored sectors 

      Camalich, Jorge Martin; Terol-Calvo, Jorge; Tolos Rigueiro, Laura; Ziegler, Robert (Peer reviewed; Journal article, 2021-06)
      Proto-neutron stars forming a few seconds after core-collapse supernovae are hot and dense environments where hyperons can be efficiently produced by weak processes. By making use of various state-of-the-art supernova ...
    • Symmetric teleparallel geometries 

      Coley, Alan; van den Hoogen, Robert; McNutt, David Duncan (Peer reviewed; Journal article, 2022)
      In teleparallel gravity and, in particular, in F(T) teleparallel gravity, there is a challenge in determining an appropriate (co-)frame and its corresponding spin connection to describe the geometry. Very often, the ‘proper’ ...
    • Symmetry and Equivalence in Teleparallel Gravity 

      Coley, Alan; van den Hoogen, Robert; McNutt, David Duncan (Peer reviewed; Journal article, 2020-07)
      In theories such as teleparallel gravity and its extensions, the frame basis replaces the metric tensor as the primary object of study. A choice of coordinate system, frame basis, and spin-connection must be made to obtain ...
    • T3-invariant heterotic Hull-Strominger solutions 

      Svanes, Eirik Eik; Acharya, Bobby S.; Kinsella, Alex (Peer reviewed; Journal article, 2021-01)
      We consider the heterotic string on Calabi-Yau manifolds admitting a Strominger-Yau-Zaslow fibration. Upon reducing the system in the T3-directions, the Hermitian Yang-Mills conditions can then be reinterpreted as a complex ...
    • Thermalization and dynamical spectral properties in the quark-meson model 

      Shen, Lisa; Berges, Jürgen; Pawlowski, Jan M.; Rothkopf, Alexander Karl (Peer reviewed; Journal article, 2020-07)
      We investigate the nonequilibrium evolution of the quark-meson model using two-particle irreducible effective action techniques. Our numerical simulations, which include the full dynamics of the order parameter of chiral ...
    • Thermalization of non-Abelian gauge theories at next-to-leading order 

      Fu, Yu; Ghiglieri, Jacopo; Iqbal, Shahin; Kurkela, Eero Aleksi (Peer reviewed; Journal article, 2022)
      We provide the first next-to-leading-order (NLO) weak-coupling description of the thermalization process of far-from-equilibrium systems in non-Abelian gauge theory. We study isotropic systems starting from either over- ...
    • Thermalization of weakly coupled non-Abelian plasmas at next-to-leading order 

      Fu, Yu; Ghiglieri, Jacopo; Iqbal, Shahin; Kurkela, Eero Aleksi (Peer reviewed; Journal article, 2023)
      We employ the QCD kinetic theory, including next-to-leading(NLO) order corrections in coupling constant, to study the evolution of weakly coupled non-Abelian plasmas towards thermal equilibrium. For two characteristic ...
    • Thermodynamics of antiferromagnetic solids in magnetic fields 

      Brauner, Tomas; Hofmann, Christoph (Peer reviewed; Journal article, 2020)
      We analyze the thermodynamic properties of antiferromagnetic solids subjected to a combination of mutually orthogonal uniform magnetic and staggered fields. Low- temperature series for the pressure, order parameter and ...
    • Thermopower in an anisotropic two-dimensional Weyl semimetal 

      Mandal, Ipsita; Saha, Kush (Journal article, 2020-01)
      We investigate the generation of an electric current from a temperature gradient in a two-dimensional Weyl semimetal with anisotropy in both the presence and absence of a quantizing magnetic field. We show that the anisotropy ...
    • Thoughts about the utility of perturbative QCD in the cores of neutron stars – contribution to a roundtable discussion on neutron stars and QCD 

      Kurkela, Eero Aleksi (Peer reviewed; Journal article, 2022)
      In this contribution, I discuss the utility that perturbative QCD offers in studying the matter in the cores of neutron stars. I discuss the reasons why perturbative QCD can constrain the equation of state at densities far ...