Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GothenburgSE951 papers
- Centre National de la Recherche ScientifiqueFR805 papers
- Leiden UniversityNL590 papers
- Max Planck Institute for Radio AstronomyDE405 papers
- European Southern ObservatoryCL356 papers
- Center for Astrophysics Harvard & SmithsonianUS313 papers
- Leiden Observatory304 papers
- California Institute of TechnologyUS296 papers
- National Astronomical Observatory of JapanJP280 papers
- Observatoire de ParisFR268 papers
- Stockholm UniversitySE262 papers
- Centro de AstrobiologíaES252 papers
52 papers · 1 filter
Goldstone Tensor Modes
Tom Adawi, Martin Cederwall, Ulf Gran +2
In the context of brane solutions of supergravity, we discuss a general method to introduce collective modes of any spin by exploiting a particular way of breaking symmetries. The…
Finite Tensor Deformations of Supergravity Solitons
Martin Cederwall, Ulf Gran, Magnus Holm +1
We consider brane solutions where the tensor degrees of freedom are excited. Explicit solutions to the full non-linear supergravity equations of motion are given for the M5 and D3…
Single fluxon in double stacked Josephson junctions: Analytic solution
V. M. Krasnov
We derive an approximate analytic solution for a single fluxon in a double stacked Josephson junctions (SJJ's) for arbitrary junction parameters and coupling strengths. It is shown…
Global foliations of matter spacetimes with Gowdy symmetry
Hakan Andreasson
A global existence theorem, with respect to a geometrically defined time, is shown for Gowdy symmetric globally hyperbolic solutions of the Einstein-Vlasov system for arbitrary (in…
Controlling Josephson transport by manipulation of Andreev levels in ballistic mesoscopic junctions
Goran Wendin, Vitaly S. Shumeiko, Peter Samuelsson
We discuss how to control dc Josephson current by influencing the structure and nonequilibrium population of Andreev levels via external electrostatic gates, external current injec…
Holography and the Weyl anomaly
Mans Henningson, Kostas Skenderis
We review our calculation of the Weyl anomaly for d-dimensional conformal field theories that have a description in terms of a (d + 1)-dimensional gravity theory.
Path-Integral Formulation of Dirichlet String in General Backgrounds
Supriya Kar
We investigate the dynamics of an arbitrary Dirichlet (D-) string in presence of general curved backgrounds following a path-integral formalism. In particular, we consider the inte…
Impurity corrections to the thermodynamics in spin chains using a transfer-matrix DMRG method
Stefan Rommer, Sebastian Eggert
We use the density matrix renormalization group (DMRG) for transfer matrices to numerically calculate impurity corrections to thermodynamic properties. The method is applied to two…
Resonant transport through midgap states in voltage-biased Josephson junctions of d-wave superconductors
T. Lofwander, G. Johansson, V. S. Shumeiko +2
We study theoretically the ac Josephson effect in voltage biased planar junctions of d-wave superconductors. For some orientations of the superconductors a current peak is found at…
Resonant tunneling through Andreev levels
A. Kadigrobov, L. Y. Gorelik, R. I. Shekhter +1
We use a semiclassical approach for analysing the tunneling transport through a normal conductor in contact with superconducting mirrors. Our analysis of the electron-hole propagat…
Mesoscopic superconductors under irradiation: Microwave spectroscopy of Andreev states
N. I. Lundin, L. Y. Gorelik, R. I. Shekhter +2
We show that irradiation of a voltage-biased superconducting quantum point contact at frequencies of the order of the gap energy can remove the suppression of subgap dc transport t…
Multiple Andreev reflections as a transport problem in energy space
G. Johansson, K. N. Bratus', V. S. Shumeiko +1
We present an approach for analyzing the dc current in voltage biased quantum superconducting junctions. By separating terms from different -particle processes, we find that the…
A two-channel Kondo impurity in the spin-1/2 chain: Consequences for Knight shift experiments
Sebastian Eggert, Stefan Rommer
A magnetic impurity in the spin-1/2 chain is a simple realization of the two-channel Kondo problem since the field theoretical descriptions in the spin-sector are identical. The co…
Superfluidity of indirect excitons in a quantum dot
Yu. E. Lozovik, S. A. Verzakov, M. Willander
The superfluidity and Bose-Einstein condensation of indirect excitons in two-dimensional quantum dot are studied by path-integral Monte Carlo simulations. The temperature dependenc…
Dualities between Poisson brackets and antibrackets
Igor Batalin, Robert Marnelius
Recently it has been shown that antibrackets may be expressed in terms of Poisson brackets and vice versa for commuting functions in the original bracket. Here we also introduce ge…
Longitudinal momentum distributions of {16,18}C fragments after one-neutron removal from {17,19}C
T. Baumann, H. Geissel, H. Lenske +30
The fragment separator FRS at GSI was used as an energy-loss spectrometer to measure the longitudinal momentum distributions of {16,18}C fragments after one-neutron removal reactio…
Bias and temperature dependence of the noise in a single electron transistor
Torsten Henning, B. Starmark, T. Claeson +1
A single electron transistor based on Al-AlO_x-Nb tunnel junctions was fabricated by shadow evaporation and in situ barrier formation. Its output current noise was measured, using…
Density Matrix Renormalization Group of Gapless Systems
Martin Andersson, Magnus Boman, Stellan Ostlund
We investigate convergence of the density matrix renormalization group (DMRG) in the thermodynamic limit for gapless systems. Although the DMRG correlations always decay exponentia…
Landau Ginzburg theory of the d-wave Josephson junction
S. Ostlund
This letter discusses the Landau Ginzburg theory of a Josephson junction composed of on one side a pure d-wave superconductor oriented with the axis normal to the junction…
Basics of BRST quantization on inner product spaces
Robert Marnelius, Niclas Sandstrom
There is an elaborated abstract form of BRST quantization on inner product spaces within the operator formalism which leads to BRST invariant states of the form |ph>=e^{[Q,ψ]} |ϕ>…
Alignment transition in a nematic liquid crystal due to field-induced breaking of anchoring
Valentina S. U. Fazio, Lachezar Komitov
We report on the alignment transition of a nematic liquid crystal from initially homeotropic to quasi-planar due to field-induced anchoring breaking. The initial homeotropic alignm…
Relaxation in graph coloring and satisfiability problems
Pontus Svenson, Mats G. Nordahl
Using T=0 Monte Carlo simulation, we study the relaxation of graph coloring (K-COL) and satisfiability (K-SAT), two hard problems that have recently been shown to possess a phase t…
Cotangent cohomology of rational surface singularities
Klaus Altmann, Jan Stevens
We show that the number of generators of the n-th cotangent cohomology group (n >=2) is the same for all rational surface singularities Y. For a large class of rational surface sin…
Hidden Kondo Effect in a Correlated Electron Chain
A. A. Zvyagin, H. Johannesson
We develop a general Bethe Ansatz formalism for diagonalizing an integrable model of a magnetic impurity of arbitrary spin coupled ferro- or antiferromagnetically to a chain of int…