Blar i Vitenskapelige publikasjoner (IMF) på emneord "VDP::Matematikk og Naturvitenskap: 400"
Viser treff 1-20 av 43
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Black hole spectroscopy in the next decade
(Peer reviewed; Journal article, 2020)Gravitational wave observations of the ringdown of the remnant black hole in a binary black hole coalescence provide a unique opportunity of confronting the black hole no-hair theorem in general relativity with observational ... -
Bubble nucleation and quantum initial conditions in classical statistical simulations
(Peer reviewed; Journal article, 2022)Classical-statistical lattice simulations provide a useful approximation to outof-equilibrium quantum field theory, but only for systems exhibiting large occupation numbers, and only for phenomena that are not intrinsically ... -
Chemical equilibration in hadronic collisions
(Peer reviewed; Journal article, 2019)We study chemical equilibration in out-of-equilibrium quark-gluon plasma using the first principles method of QCD effective kinetic theory, accurate at weak coupling. In longitudinally expanding systems—relevant for ... -
Chemical equilibration in weakly coupled QCD
(Peer reviewed; Journal article, 2019)We study thermalization, hydrodynamization, and chemical equilibration in out-of-equilibrium quark-gluon plasma starting from various initial conditions using QCD effective kinetic theory, valid at weak coupling. In ... -
Connecting the Dots: Numerical Randomized Hamiltonian Monte Carlo with State-Dependent Event Rates
(Peer reviewed; Journal article, 2022)Numerical generalized randomized Hamiltonian Monte Carlo is introduced, as a robust, easy to use and computationally fast alternative to conventional Markov chain Monte Carlo methods for continuous target distributions. A ... -
Correlating confinement to topological fluctuations near the crossover transition in QCD
(Peer reviewed; Journal article, 2022)We show the existence of strong (anti)correlations between the topological hot spots and the local values of the trace of the Polyakov loop in 2+1 flavor QCD with physical quark mass, in the vicinity of the crossover ... -
Cosmology with the Laser Interferometer Space Antenna
(Peer reviewed; Journal article, 2023)The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications ... -
Crystal field effects in the zig-zag chain compound SrTm2O4
(Peer reviewed; Journal article, 2022)The single ion properties of the zig-zag chain compound SrTm2O4 have been investigated using heat capacity, magnetic susceptibility, magnetization, inelastic neutron scattering, and polarized muon spectroscopy. Two crystal ... -
Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions
(Peer reviewed; Journal article, 2019)We develop a macroscopic description of the space-time evolution of the energy-momentum tensor during the pre-equilibrium stage of a high-energy heavy-ion collision. Based on a weak coupling effective kinetic description ... -
Exceptional nonrelativistic effective field theories with enhanced symmetries
(Peer reviewed; Journal article, 2021)We initiate the classification of nonrelativistic effective field theories (EFTs) for Nambu-Goldstone (NG) bosons, possessing a set of redundant, coordinate-dependent symmetries. Similarly to the relativistic case, such ... -
Families of Proper Holomorphic Embeddings and Carleman-Type Theorem with parameters
(Peer reviewed; Journal article, 2023)We solve the problem of simultaneously embedding properly holomorphically into C2 a whole family of n-connected domains Omega_r in P1 such that none of the components of P1 \ Omega_r reduces to a point, by constructing a ... -
Field theories with higher-group symmetry from composite currents
(Peer reviewed; Journal article, 2021)Higher-form symmetries are associated with transformations that only act on extended objects, not on point particles. Typically, higher-form symmetries live alongside ordinary, point-particle (0-form), symmetries and they ... -
Flavor structure of GUTs and uncertainties in proton lifetime estimates
(Peer reviewed; Journal article, 2019)We study the flavor aspects of proton lifetime estimates in simple grand-unified models, paying particular attention to their inherent fragility due to the notorious lack of control of some of the key parameters governing ... -
Flow in AA and pA as an interplay of fluid-like and non-fluid like excitations
(Peer reviewed; Journal article, 2019)To study the microscopic structure of quark–gluon plasma, data from hadronic collisions must be confronted with models that go beyond fluid dynamics. Here, we study a simple kinetic theory model that encompasses fluid ... -
Geometric surfaces: An invariant characterization of spherically symmetric black hole horizons and wormhole throats
(Peer reviewed; Journal article, 2021)We consider a spherically symmetric line element which admits either a black hole geometry or a wormhole geometry and show that in both cases the apparent horizon or the wormhole throat is partially characterized by the ... -
A GIT construction of degenerations of Hilbert schemes of points
(Peer reviewed; Journal article, 2019)We present a Geometric Invariant Theory (GIT) construction which allows us to construct good projective degenerations of Hilbert schemes of points for simple degenerations. A comparison with the construction of Li and Wu ... -
Heavy quarkonium in extreme conditions
(Peer reviewed; Journal article, 2020)In this report we review recent progress achieved in the understanding of heavy quarkonium under extreme conditions from a theory perspective. Its focus lies both on quarkonium properties in thermal equilibrium, as well ... -
Importance Sampling-based Transport Map Hamiltonian Monte Carlo for Bayesian Hierarchical Models
(Peer reviewed; Journal article, 2021-06)We propose an importance sampling (IS)-based transport map Hamiltonian Monte Carlo procedure for performing a Bayesian analysis in nonlinear high-dimensional hierarchical models. Using IS techniques to construct a transport ... -
Improved background subtraction and a fresh look at jet sub-structure in JEWEL
(Peer reviewed; Journal article, 2022)Interactions of hard partons in the Quark Gluon Plasma (QGP) created with relativistic heavy ion collisions lead to characteristic modifications of the internal structure of reconstructed jets. A large part of the observed ... -
Inhomogeneous chiral condensate in the quark-meson model
(Journal article, 2017)The two-flavor quark-meson model is used as a low-energy effective model for QCD to study inhomogeneous chiral condensates at finite baryon chemical potential μ B. The parameters of the model are determined by matching the ...