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
47 papers · 1 filter
Diffusion on Complex Networks : A way to probe their large scale topological structures
Ingve Simonsen, Kasper Astrup Eriksen, Sergei Maslov +1
A diffusion process on complex networks is introduced in order to uncover their large scale topological structures. This is achieved by focusing on the slowest decaying diffusive m…
Self-similar scaling in decaying numerical turbulence
Tarek A. Yousef, Nils Erland L. Haugen, Axel Brandenburg
Decaying turbulence is studied numerically using as initial condition a random flow whose shell-integrated energy spectrum increases with wavenumber k like k^q. Alternatively, init…
Correlation Length Exponent in the Three-Dimensional Fuse Network
Thomas Ramstad, Jan O. H. Bakke, Johannes Bjelland +2
We present numerical measurements of the critical correlation length exponent nu in the three-dimensional fuse model. Using sufficiently broad threshold distributions to ensure tha…
Support varieties for selfinjective algebras
Karin Erdmann, Miles Holloway, Nicole Snashall +2
Support varieties for any finite dimensional algebra over a field were introduced by Snashall-Solberg using graded subalgebras of the Hochschild cohomology. We mainly study these v…
Inflationary Dilatonic de Sitter Universe from Super Yang - Mills Theory Perturbed by Scalars and Spinors
Iver Brevik, John Quiroga Hurtado
In this paper a quantum N = 4 super Yang-Mills theory perturbed by dilaton-coupled scalars and spinor fields is considered. The induced effective action for such a theory is calcul…
Hecke C*-algebras, Schlichting completions, and Morita equivalence
S. Kaliszewski, Magnus B. Landstad, John Quigg
The Hecke algebra H(G,H) of a Hecke pair (G,H) is studied using the Schlichting completion (G',H'), which is a Hecke pair whose Hecke algebra is isomorphic to H(G,H) and which is t…
Metal-Insulator Transition in Two- and Three-Dimensional Logarithmic Plasmas
S. Kragset, A. Sudbo, F. S. Nogueira
We consider scaling of the mean square dipole moments in a plasma with logarithmic interactions in a two- and three-dimensional system. In both cases, we establish the existence of…
Phase structure of Abelian Chern-Simons gauge theories
E. Smorgrav, J. Smiseth, A. Sudbo +1
We study the effect of a Chern-Simons (CS) term in the phase structure of two different Abelian gauge theories. For the compact Maxwell-Chern-Simons theory, we obtain that for valu…
Nonequilibrium translational effects in evaporation and condensation
D. Bedeaux, S. Kjelstrup, J. M. Rubi
This paper shows how mesoscopic nonequilibrium thermodynamics can be applied to condensation and evaporation. By extending the normal set of thermodynamic variables with two intern…
Representations of the exceptional Lie superalgebra E(3,6) III: Classification of singular vectors
Victor G. Kac, Alexei Rudakov
We continue the study of irreducible representations of the exceptional Lie superalgebra E(3,6). This is one of the two simple infinite-dimensional Lie superalgebras of vector fiel…
Compact U(1) gauge theories in 2+1 dimensions and the physics of low dimensional insulating materials
F. S. Nogueira, J. Smiseth, E. Smoergrav +1
Compact abelian gauge theories in dimensions arise often as an effective field-theoretic description of models of quantum insulators. In this paper we review some recent re…
Growth activity during fingering in a porous Hele Shaw cell
Grunde Lovoll, Yves Meheust, Renaud Toussaint +2
We present in this paper an experimental study of the invasion activity during unstable drainage in a 2D random porous medium, when the (wetting) displaced fluid has a high viscosi…
Dynamic ferromagnetic proximity effect in photoexcited semiconductors
Gerrit E. W. Bauer, Arne Brataas, Yaroslav Tserkovnyak +3
The spin dynamics of photoexcited carriers in semiconductors in contact with a ferromagnet is treated theoretically and compared with time-dependent Faraday rotation experiments. T…
Effective action and brane running
Iver Brevik, Kazuo Ghoroku, Masanobu Yahiro
We address the renormalized effective action for a Randall-Sundrum brane running in 5d bulk space. The running behavior of the brane action is obtained by shifting the brane-positi…
Two-Brane Randall-Sundrum Model in AdS_5 and dS_5
I. Brevik, K. Børkje, J. P. Morten
Two flat Randall - Sundrum three-branes are analyzed, at fixed mutual distance, in the case where each brane contains an ideal isotropic fluid. Both fluids are to begin with assume…
Cooperativity in a trading model with memory and production
R. Donangelo, K. Sneppen
We consider in a market model the cooperative emergence of value due to a positive feedback between perception of needs and demand. Here we consider also a negative feedback from p…
Scaling in Fracture and Refreezing of Sea Ice
R. Korsnes, S. R. Souza, R. Donangelo +2
Sea ice breaks up and regenerates rapidly during winter conditions in the Arctic. Analyzing satellite data from the Kara Sea, we find that the average ice floe size depends on weat…
Non-monotonic angular magnetoresistance in asymmetric spin valves
Jan Manschot, Arne Brataas, Gerrit E. W. Bauer
The electric resistance of ferromagnet/normal-metal/ferromagnet perpendicular spin valves depends on the relative angle between the magnetization directions. In contrast to common…
Homogeneous Nucleation in Inhomogeneous Media II: Nucleation in a Shear Flow
D. Reguera, J. M. Rubi
We investigate the influence of a shear flow on the process of nucleation. Mesoscopic nonequilibrium thermodynamics is used to derive the Fokker-Planck equation governing the evolu…
Homogeneous Nucleation in Inhomogeneous Media I: Nucleation in a Temperature Gradient
D. Reguera, J. M. Rubi
We introduce a general formalism to analyze nucleation phenomena in inhomogeneous media which considers the influence of the metastable phase, which is treated as a heat bath in wh…
Spin detection in quantum dots by electric currents
Eugene G. Mishchenko, Arne Brataas, Yaroslav Tserkovnyak
We develop a theoretical description of transport through quantum dots connected to reservoirs via spin-polarized ballistic contacts. Rate equations account for spin accumulation i…
Randall-Sundrum Model in the Presence of a Brane Bulk Viscosity
I. Brevik, A. Hallanger
The presence of a bulk viscosity for the cosmic fluid on a single Randall-Sundrum brane is considered. The spatial curvature is assumed to be zero. The five-dimensional Friedmann e…
Two-phase flow in porous media: dynamical phase transition
Henning Arendt Knudsen, Alex Hansen
Two-phase flow systems in porous media have complex dynamics. It is well established that a wide range of system parameters like viscosities and porosity as well as flow parameters…
On the Quantum Phase Operator for Coherent States
Bo-Sture K. Skagerstam, Bjorn A. Bergsjordet
In papers by Lynch [Phys. Rev. A41, 2841 (1990)] and Gerry and Urbanski [Phys. Rev. A42, 662 (1990)] it has been argued that the phase-fluctuation laser experiments of Gerhardt, Bü…