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
112 papers · 1 filter
Mesh ratios for best-packing and limits of minimal energy configurations
A. V. Bondarenko, D. P. Hardin, E. B. Saff
For -point best-packing configurations on a compact metric space , we obtain estimates for the mesh-separation ratio , which is the quotient of the coveri…
Extremal states of positive partial transpose in a system of three qubits
Øyvind Steensgaard Garberg, Børge Irgens, Jan Myrheim
We have studied mixed states in the system of three qubits with the property that all their partial transposes are positive, these are called PPT states. We classify a PPT state by…
Quasi-Rip and Pseudo-Rip Universes Induced by the Fluid Inhomogeneous Equation of State
I. Brevik, V. V. Obukhov, A. V. Timoshkin
We investigate specific models for a dark energy universe leading to Quasi-Rip and Pseudo-Rip cosmologies. In the Quasi-Rip model the equation of state parameter w is less than -1…
Cavity QED simulation of qubit-oscillator dynamics in the ultrastrong coupling regime
Arne L. Grimsmo, Scott Parkins
We propose a quantum simulation of a two-level atom coupled to a single mode of the electromagnetic field in the ultrastrong-coupling regime based upon resonant Raman transitions i…
Theory of microdroplet and microbubble deformation by Gaussian laser beam
Simen Å Ellingsen
The theory for linear deformations of fluid microparticles in a laser beam of Gaussian profile is presented, when the beam focus is at the particle center as in optical trapping. T…
Purely infinite crossed products by endomorphisms
Eduard Ortega, Enrique Pardo
We study the crossed product -algebra associated to injective endomorphisms, which turns out to be equivalent to study the crossed product by the dilated autormorphism. We pro…
Tagged mapping class groups: Auslander-Reiten translation
Thomas Brüstle, Yu Qiu
We give a geometric realization, the tagged rotation, of the AR-translation on the generalized cluster category associated to a surface with marked points and non-empt…
Product of Volterra type integral and composition operators on weighted Fock spaces
Tesfa Mengestie
We characterize the bounded, compact, and Schatten class product of Volterra type integral and composition operators acting between weighted Fock spaces. Our results are expressed…
The range of holomorphic maps at boundary points
Filippo Bracci, John Erik Fornaess
We prove a boundary version of the open mapping theorem for holomorphic maps between strongly pseudoconvex domains. That is, we prove that the local image of a holomorphic map $f:D…
Viscosity in modified gravity
Iver Brevik
A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, on the basis of a natural scaling law for the viscosity, a simple solution can be found for q…
Proximity effect with noncentrosymmetric superconductors
Gaetano Annunziata, Dirk Manske, Jacob Linder
We describe the superconducting proximity effect taking place in a contact between a noncentrosymmetric superconductor and a diffusive normal/ferromagnetic metal within the quasicl…
Effects of city-size heterogeneity on epidemic spreading in a metapopulation: A reaction-diffusion approach
Halvor Lund, Ludvig Lizana, Ingve Simonsen
We review and introduce a generalized reaction-diffusion approach to epidemic spreading in a metapopulation modeled as a complex network. The metapopulation consists of susceptible…
Two-color QCD in a strong magnetic field: The role of the Polyakov loop
Jens O. Andersen, Arturo A. Cruz
We study two-color QCD in an external magnetic backround at finite temperature using the Polyakov-loop extended two-flavor two-color NJL model. At T=0, the chiral condensate is cal…
Exotic group C*-algebras in noncommutative duality
S. Kaliszewski, Magnus B. Landstad, John Quigg
We show that for a locally compact group G there is a one-to-one correspondence between G-invariant weak*-closed subspaces E of the Fourier-Stieltjes algebra B(G) containing B_r(G)…
Commutative S-algebras of prime characteristics and applications to unoriented bordism
Markus Szymik
The notion of highly structured ring spectra of prime characteristic is made precise and is studied via the versal examples S//p for prime numbers p. These can be realized as Thom…
Direct band structure measurement of a buried two-dimensional electron gas
Jill A. Miwa, Philip Hofmann, Michelle Y. Simmons +1
Buried two dimensional electron gasses (2DEGs) have recently attracted considerable attention as a testing ground for both fundamental physics and quantum computation applications.…
Error Estimation, Error Correction and Verification In Quantum Key Distribution
Øystein Marøy, Magne Gudmundsen, Lars Lydersen +1
We consider error correction in quantum key distribution. To avoid that Alice and Bob unwittingly end up with different keys precautions must be taken. Before running the error cor…
Little Rip cosmological models with time-dependent equation of state
I. Brevik, V. V. Obukhov, K. E. Osetrin +1
Specific dark energy models, leading to the Little Rip (LR) cosmology in the far future, are investigated. Conditions for the occurrence of LR in terms of the parameters present in…
The Linear Model under Mixed Gaussian Inputs: Designing the Transfer Matrix
John T. Flåm, Dave Zachariah, Mikko Vehkaperä +1
Suppose a linear model y = Hx + n, where inputs x, n are independent Gaussian mixtures. The problem is to design the transfer matrix H so as to minimize the mean square error (MSE)…
On the convergence of the Escalator Boxcar Train
Åke Brännström, Linus Carlsson, Daniel Simpson
The Escalator Boxcar Train (EBT) is a numerical method that is widely used in theoretical biology to investigate the dynamics of physiologically structured population models, i.e.,…
An Eigenvalue Problem with variable exponents
Giovanni Franzina, Peter Lindqvist
A highly nonlinear eigenvalue problem is studied in a Sobolev space with variable exponent. The Euler-Lagrange equation for the minimization of a Rayleigh quotient of two Luxemburg…
Projective dimension in filtrated K-theory
Rasmus Bentmann
Under mild assumptions, we characterise modules with projective resolutions of length n in the target category of filtrated K-theory over a finite topological space in terms of two…
Quark number susceptibilities from resummed perturbation theory
Jens O. Andersen, Sylvain Mogliacci, Nan Su +1
We evaluate the second and fourth order quark number susceptibilities in hot QCD using two variations of resummed perturbation theory. On one hand, we carry out a one-loop calculat…
Staggered Dynamics in Antiferromagnets by Collective Coordinates
Erlend G. Tveten, Alireza Qaiumzadeh, O. A. Tretiakov +1
Antiferromagnets can be used to store and manipulate spin information, but the coupled dynamics of the staggered field and the magnetization are very complex. We present a theory w…