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
61 papers · 1 filter
Temperature Dependence of the Casimir Effect
I. Brevik, J. B. Aarseth
In view of the increasing accuracy of Casimir experiments, there is a need for performing accurate theoretical calculations. Using accurate experimental data for the permittivities…
C*-crossed products and shift spaces
Toke Meier Carlsen, Sergei Silvestrov
In this article, we use Exel's construction to associate a C*-algebra to every shift space. We show that it has the C*-algebra defined in [Carlsen and Matsumoto: Some remarks on th…
Uniqueness theorems for Korenblum type spaces
Alexander Borichev, Yurii Lyubarskii
For a scale of spaces of functions analytic in the unit disc, including the Korenblum space, and for some natural families of uniqueness subsets for , we descri…
The Universality Class of Diffusion Limited Aggregation and Viscous Fingering
Joachim Mathiesen, Itamar Procaccia, Harry L. Swinney +1
We investigate whether fractal viscous fingering and diffusion limited aggregates are in the same scaling universality class. We bring together the largest available viscous finger…
Viscous Brane Cosmology with a Brane-Bulk Energy Interchange Term
Iver Brevik, Jon-Mattis Borven, Sebastian Ng
We assume a flat brane located at y=0, surrounded by an AdS space, and consider the 5D Einstein equations when the energy flux component of the energy-momentum tensor is related to…
Cluster-tilted algebras are Gorenstein and stably Calabi-Yau
Bernhard Keller, Idun Reiten
We prove that in a 2-Calabi-Yau triangulated category, each cluster tilting subcategory is Gorenstein with all its finitely generated projectives of injective dimension at most one…
Tame concealed algebras and cluster quivers of minimal infinite type
Aslak Bakke Buan, Idun Reiten, Ahmet I. Seven
In this paper we explain how and why the list of Happel-Vossieck of tame concealed algebras is closely related to the list of A. Seven of minimal infinite cluster quivers.
Current-induced magnetization dynamics in disordered itinerant ferromagnets
Yaroslav Tserkovnyak, Hans Joakim Skadsem, Arne Brataas +1
Current-driven magnetization dynamics in ferromagnetic metals are studied in a self-consistent adiabatic local-density approximation in the presence of spin-conserving and spin-dep…
Crossover behavior in failure avalanches
Srutarshi Pradhan, Alex Hansen, Per C. Hemmer
Composite materials, with statistically distributed threshold for breakdown of individual elements, are considered. During the failure process of such materials under external stre…
The origin and evolution of cluster magnetism
A. Shukurov, K. Subramanian, N. E. L. Haugen
Random motions can occur in the intergalactic gas of galaxy clusters at all stages of their evolution. Depending on the poorly known value of the Reynolds number, these motions can…
Clustering of ultra-high energy cosmic ray arrival directions on medium scales
M. Kachelriess, D. V. Semikoz
The two-point autocorrelation function of ultra-high energy cosmic ray (UHECR) arrival directions has a broad maximum around 25 degrees, combining the data with energies above $4\t…
Magnetomechanical Torques in Small Magnetic Cantilevers
Alexey A. Kovalev, Gerrit E. W. Bauer, Arne Brataas
We study the dnamics of small magnetic cantilevers, either made from Si covered by a magnetic film or entirely ferromagnetic ones. The magnetomechanical torques are found to cause…
Model structures on pro-categories
Halvard Fausk, Daniel C. Isaksen
We introduce a notion of a filtered model structure and use this notion to produce various model structures on pro-categories. This framework generalizes several known examples. We…
Effects of detector efficiency mismatch on security of quantum cryptosystems
Vadim Makarov, Andrey Anisimov, Johannes Skaar
We suggest a type of attack on quantum cryptosystems that exploits variations in detector efficiency as a function of a control parameter accessible to an eavesdropper. With gated…
Cluster evolution in steady-state two-phase flow in porous media
Thomas Ramstad, Alex Hansen
We report numerical studies of the cluster development of two-phase flow in a steady-state environment of porous media. This is done by including biperiodic boundary conditions in…
Self-Affinity in the Gradient Percolation Problem
Alex Hansen, G. George Batrouni, Thomas Ramstad +1
We study the scaling properties of the solid-on-solid front of the infinite cluster in two-dimensional gradient percolation. We show that such an object is self affine with a Hurst…
Reconciling the ultra-high energy cosmic ray spectrum with Fermi shock acceleration
M. Kachelriess, D. V. Semikoz
The energy spectrum of ultra-high energy cosmic rays (UHECR) is usually calculated for sources with identical properties. Assuming that all sources can accelerate UHECR protons to…
Blackouts, risk, and fat-tailed distributions
Rafal Weron, Ingve Simonsen
We analyze a 19-year time series of North American electric power transmission system blackouts. Contrary to previously reported results we find a fatter than exponential decay in…
Clusters and seeds in acyclic cluster algebras
Aslak Bakke Buan, Bethany Marsh, Idun Reiten +1
We show that for cluster algebras associated with finite quivers without oriented cycles (with no coefficients), a seed is determined by its cluster, as conjectured by Fomin and Ze…
Metrically Stationary, Axially Symmetric, Isolated Systems in Quasi-Metric Gravity
Dag Østvang
The gravitational field exterior respectively interior to an axially symmetric, metrically stationary, isolated spinning source made of perfect fluid is examined within the quasi-m…
The Galactic magnetic field as spectrograph for ultra-high energy cosmic rays
M. Kachelriess, P. D. Serpico, M. Teshima
We study the influence of the regular component of the Galactic magnetic field (GMF) on the arrival directions of ultra-high energy cosmic rays (UHECRs). We find that, if the angul…
Using synchrotron X-ray scattering to study the diffusion of water in a weakly-hydrated clay sample
Y. Meheust, B. Sandnes, G. Lovoll +6
We study the diffusion of water in weakly-hydrated samples of the smectite clay Na-fluorohectorite. The quasi one-dimensional samples are dry compounds of nano-layered particles co…
Fresnel equations and the refractive index of active media
Johannes Skaar
There exists a class of realizable, active media for which the refractive index cannot be defined as an analytic function in the upper half-plane of complex frequency. The conventi…
Cluster-tilted algebras of finite representation type
Aslak Bakke Buan, Bethany Marsh, Idun Reiten
We investigate the cluster-tilted algebras of finite representation type over an algebraically closed field. We give an explicit description of the relations for the quivers for fi…