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
90 papers · 1 filter
Finding a cluster-tilting object for a representation finite cluster-tilted algebra
Marco Angel Bertani-Økland, Steffen Oppermann, Anette Wrålsen
We provide a technique to find a cluster-tilting object having a given cluster-tilted algebra as endomorphism ring in the finite type case.
Discrete Hilbert transforms on sparse sequences
Yurii Belov, Tesfa Y. Mengestie, Kristian Seip
Weighted discrete Hilbert transforms from to a weighted space are studied, with a sequence of distinct points in…
Transverse radiation force in a tailored optical fiber
Iver Brevik, Simen Å. Ellingsen
We show, by means of simple model calculations, how a weak laser beam sent through an optical fiber exerts a transverse radiation force if there is an azimuthal asymmetry present i…
On the role of electroweak bremsstrahlung for indirect dark matter signatures
M. Kachelriess, P. D. Serpico, M. Aa. Solberg
Interpretations of indirect searches for dark matter (DM) require theoretical predictions for the annihilation or decay rates of DM into stable particles of the standard model. The…
Anderson orthogonality catastrophe in realistic quantum dots
Swarnali Bandopadhyay, Martina Hentschel
We study Anderson orthogonality catastrophe (AOC) for an parabolic quantum dot (PQD), one of the experimentally realizable few-electron systems. The finite number of electrons in P…
Electromagnetic Casimir Effect in Wedge Geometry and the Energy-Momentum Tensor in Media
I. Brevik, S. A. Ellingsen, K. A. Milton
The wedge geometry closed by a circular-cylindrical arc is a nontrivial generalization of the cylinder, which may have various applications. If the radial boundaries are not perfec…
Stable categories of higher preprojective algebras
Osamu Iyama, Steffen Oppermann
We introduce (n+1)-preprojective algebras of algebras of global dimension n. We show that if an algebra is n-representation-finite then its (n+1)-preprojective algebra is self-inje…
Asynchronous CDMA Systems with Random Spreading-Part I: Fundamental Limits
Laura Cottatellucci, Ralf R. Mueller, Merouane Debbah
Spectral efficiency for asynchronous code division multiple access (CDMA) with random spreading is calculated in the large system limit allowing for arbitrary chip waveforms and fr…
Asynchronous CDMA Systems with Random Spreading-Part II: Design Criteria
Laura Cottatellucci, Ralf R. Mueller, Merouane Debbah
Totally asynchronous code-division multiple-access (CDMA) systems are addressed. In Part I, the fundamental limits of asynchronous CDMA systems are analyzed in terms of spectral ef…
Hard-thermal-loop QED thermodynamics
Nan Su, Jens O. Andersen, Michael Strickland
The weak-coupling expansion for thermodynamic quantities in thermal field theories is poorly convergent unless the coupling constant is tiny. We discuss the calculation of the free…
Pseudo Spin Valves Using a (112)-textured DO_22 MnGa Fixed Layer
C. L. Zha, R. K. Dumas, J. Persson +3
We demonstrate pseudo spin valves with a (112)-textured DO_22 MnGa (MnGa) tilted magnetization fixed layer and an in-plane CoFe free layer. Single D0_22 MnGa films exhibit a small…
A convergent mixed method for the Stokes approximation of viscous compressible flow
Kenneth Karlsen, Trygve Karper
We propose a mixed finite element method for the motion of a strongly viscous, ideal, and isentropic gas. At the boundary we impose a Navier-slip condition such that the velocity e…
Sum Rates, Rate Allocation, and User Scheduling for Multi-User MIMO Vector Perturbation Precoding
Adeel Razi, Daniel J. Ryan, Iain B. Collings +1
This paper considers the multiuser multiple-input multiple-output (MIMO) broadcast channel. We consider the case where the multiple transmit antennas are used to deliver independen…
Spin-dependent boundary conditions for isotropic superconducting Green's functions
Audrey Cottet, Daniel Huertas-Hernando, Wolfgang Belzig +1
The quasiclassical theory of superconductivity provides the most successful description of diffusive heterostructures comprising superconducting elements, namely, the Usadel equati…
Unconventional superconductivity on a topological insulator
Jacob Linder, Yukio Tanaka, Takehito Yokoyama +2
We study proximity-induced superconductivity on the surface of a topological insulator (TI), focusing on unconventional pairing. We find that the excitation spectrum becomes gaples…
Heat diffusion in a two-dimensional thermal fuse model
Glenn Tørå, Alex Hansen
We present numerical studies of electrical breakdown in disordered materials using a two-dimensional thermal fuse model with heat diffusion. A conducting fuse is heated locally by…
Thermopower and Thermally Induced Domain Wall Motion in (Ga,Mn)As
Kjetil M. D. Hals, Arne Brataas, Gerrit E. W. Bauer
We study two reciprocal thermal effects in the ferromagnetic semiconductor (Ga,Mn)As by scattering theory: domain wall motion induced by a temperature gradient as well as heat curr…
Gluon Thermodynamics at Intermediate Coupling
Jens O. Andersen, Michael Strickland, Nan Su
We calculate the thermodynamic functions of Yang-Mills theory to three-loop order using the hard-thermal-loop perturbation theory reorganization of finite temperature quantum field…
Unitary discrete Hilbert transforms
Yurii Belov, Tesfa Y. Mengestie, Kristian Seip
Weighted discrete Hilbert transforms from to are considered, where and are disjoint…
Global semigroup of conservative solutions of the nonlinear variational wave equation
Helge Holden, Xavier Raynaud
We prove the existence of a global semigroup for conservative solutions of the nonlinear variational wave equation . We allow for initial data …
Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism
The OPAL Collaboration
Data collected around sqrt{s}=91 GeV by the OPAL experiment at the LEP e+e- collider are used to study the mechanism of baryon formation. As the signature, the fraction of Sigma-hy…
The Scattering of Electromagnetic Waves from Two-Dimensional Randomly Rough Perfectly Conducting Surfaces: The Full Angular Intensity Distribution
Ingve Simonsen, Alexei A. Maradudin, Tamara A. Leskova
By a computer simulation approach we study the scattering of - or -polarized light from a two-dimensional, randomly rough, perfectly conducting surface. The pair of coupled i…
Casimir-Polder Potential in Thermal Non-Equilibrium
Simen Å. Ellingsen, Yury Sherkunov, Stefan Y. Buhmann +1
Different non-equilibrium situations have recently been considered when studying the thermal Casimir--Polder interaction with a body. We show that the Keldysh Green function method…
Nanoscale Magnetic Heat Pumps and Engines
Gerrit E. W. Bauer, Stefan Bretzel, Arne Brataas +1
We present the linear response matrix for a sliding domain wall in a rotatable magnetic nanowire, which is driven out of equilibrium by temperature and voltage bias, mechanical tor…