3.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of OsloNO153 papers
- Centre National de la Recherche ScientifiqueFR139 papers
- KTH Royal Institute of TechnologySE92 papers
- SINTEFNO92 papers
- Johannes Gutenberg University MainzDE57 papers
- Delft University of TechnologyNL56 papers
- University of CopenhagenDK55 papers
- ETH ZurichCH46 papers
- Tomsk State Pedagogical UniversityRU44 papers
- University of CambridgeGB41 papers
- Stockholm UniversitySE40 papers
- Eindhoven University of TechnologyNL38 papers
24 papers · 1 filter
Pathways in Two-State Protein Folding
Audun Bakk, Johan S. Hoye, Alex Hansen +2
The thermodynamics of proteins indicate that folding/unfolding takes place either through stable intermediates or through a two-state process without intermediates. The rather shor…
The Angular Intensity Correlation Functions C^{(1)} and C^{(10)} for the Scattering of Light from Randomly Rough Dielectric and Metal Surfaces
Tamara A. Leskova, Ingve Simonsen, Alexei A. Maradudin
We study the statistical properties of the scattering matrix S(q|k) for the problem of the scattering of light from a randomly rough one-dimensional surface, defined by the equatio…
On the Phases Structure of the Micromaser System
Per K Rekdal, Bo-Sture K Skagerstam
We investigate, in an exact manner, the phase structure of the micromaser system in terms of the physical parameters at hand like the atom cavity transit time, the atom-photon freq…
Quantum Dynamics of Non-Degenerate Parametric Amplification
Per Rekdal, Bo-Sture Skagerstam
A simple model of a two-mode non-resonant parametric amplifier is studied with special regard to non-classical features such as revivals and squeezing. The methods used apply for a…
Magnetohydrodynamics in the Inflationary Universe
I. Brevik, H. B. Sandvik
Magnetohydrodynamic (MHD) waves are analysed in the early Universe, in the inflationary era, assuming the Universe to be filled with a nonviscous fluid of the Zel'dovich type ($p=ρ…
An Explanation of the "Pioneer Effect" based on Quasi-Metric Relativity
Dag Østvang
According to the socalled "quasi-metric" framework developed elsewhere, the cosmic expansion applies directly to gravitationally bound systems. This prediction has a number of obse…
Energy Production in the Formation of a Finite Thickness Cosmic String
I. Brevik, A. G. Frøseth
The classical electromagnetic modes outside a long, straight, superconducting cosmic string are calculated, assuming the string to be surrounded by a superconducting cylindric surf…
A Fast Algorithm for Generating Long Self-Affine Profiles
Ingve Simonsen, Alex Hansen
We introduce a fast algorithm for generating long self-affine profiles. The algorithm, which is based on the fast wavelet transform, is faster than the conventional Fourier filteri…
Correlation functions for a two-dimensional electron system with bosonic interactions and a square Fermi surface
J. O. Fjaerestad, A. Sudbo, A. Luther
We calculate zero-temperature correlation functions for a model of 2D interacting electrons with short-range interactions and a square Fermi surface. The model was arrived at by ma…
Anomalous scaling dimensions and critical points in type-II superconductors
A. Sudbø, A. K. Nguyen, J. Hove
The existence of a {\it stable critical point}, separate from the Gaussian and XY critical points, of the Ginzburg-Landau theory for superconductors, is demonstrated by direct extr…
Topological phase-fluctuations, amplitude fluctuations, and criticality in extreme type-II superconductors
A. K. Nguyen, A. Sudbø
We study the effect of critical fluctuations on the phase diagram in extreme type-II superconductors in zero and finite magnetic field using large-scale Monte Carlo simulat…
Wave scattering from self-affine surfaces
Ingve Simonsen, Damien Vandembroucq, Stephane Roux
Electromagnetic wave scattering from a perfectly reflecting self-affine surface is considered. Within the framework of the Kirchhoff approximation, we show that the scattering cros…
Optical response of supported particles
Ingve Simonsen, Remi Lazzari, Jacques Jupille +1
The present work reports a general method for the calculation of t he polarizability of a truncated sphere on a substrate. A multipole ex pansion is used, where the multipoles are…
Viscous stabilization of 2D drainage displacements with trapping
Eyvind Aker, Knut Jorgen Maloy, Alex Hansen
We investigate the stabilization mechanisms due to viscous forces in the invasion front during drainage displacement in two-dimensional porous media using a network simulator. We f…
Self-Screening Hawking Atmosphere in the Presence of a Bulk Viscosity
I. Brevik
The recent theory of 't Hooft [ Nucl. Phys. Suppl. {\bf 68}, 174 (1998)] models the black hole as a system endowed with an envelope of matter that obeys an equation of state in the…
Diamagnetic Susceptibility and Current Distributions in Granular Superconductors at Percolation
Henning A. Knudsen, Alex Hansen
Comments: 4 pages RevTeX, 4 Postscript figures. References added. We study a two-dimensional granular superconducting network at the percolation threshold under the influence of an…
Non-k-diagonality in the interlayer pair-tunneling model of high-temperature superconductivity
J. O. Fjaerestad, A. Sudbo
We investigate the effect of k-space broadening of the interlayer pairing kernel on the critical temperature T_c and the k-dependence of the gap function in a one-dimensional versi…
A Model for the Thermodynamics of Globular Proteins
Alex Hansen, Mogens H. Jensen, Kim Sneppen +1
Comments: 6 pages RevTeX, 6 Postscript figures. We review a statistical mechanics treatment of the stability of globular proteins based on a simple model Hamiltonian taking into ac…
Limit Cycle Oscillations in Pacemaker Cells
Lars Petter Endresen, Nils Skarland
In recent decades, several mathematical models describing the pacemaker activity of the rabbit sinoatrial node have been developed. We demonstrate that it is not possible to establ…
The Casimir Problem of Spherical Dielectrics: A Solution in Terms of Quantum Statistical Mechanics
J. S. Høye, I. Brevik
The Casimir energy for a compact dielectric sphere is considered in a novel way, using the quantum statistical method introduced by H\oye - Stell and others. Dilute media are assum…
From the Liouville Equation to the Generalized Boltzmann Equation for Magnetotransport in the 2D Lorentz Model
A. V. Bobylev, Alex Hansen, J. Piasecki +1
We consider a system of non-interacting charged particles moving in two dimensions among fixed hard scatterers, and acted upon by a perpendicular magnetic field. Recollisions betwe…
Quantum Cosmology from \cal{N} = 4 Super Yang - Mills Theory
I. Brevik, S. D. Odintsov
We consider quantum \cal{N} = 4 super Yang-Mills theory interacting in a covariant way with \cal{N} = 4 conformal supergravity. The induced large N effective action for such a theo…
Mass and Decay Spectra of the Piecewise Uniform String
I. Brevik, A. A. Bytsenko, A. E. Goncalves
Mass and decay spectra are calculated for quantum massive excitations of a piecewise uniform bosonic string. The physical meaning of the critical temperatures characterizing the ra…
Casimir Surface Force on a Dilute Dielectric Ball
Iver Brevik, Valery Marachevsky
The Casimir surface force density F on a dielectric dilute spherical ball of radius a, surrounded by a vacuum, is calculated at zero temperature. We treat (n-1) (n being the refrac…