2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR75 papers
- University of MünsterDE37 papers
- Los Alamos National LaboratoryUS33 papers
- Max Planck Institute for Dynamics and Self-OrganizationDE26 papers
- Observatoire de la Côte d’AzurFR26 papers
- University of StuttgartDE25 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE23 papers
- Heinrich Heine University DüsseldorfDE23 papers
- Northwestern UniversityUS23 papers
- Deutsches Elektronen-Synchrotron DESYDE22 papers
- Bogolyubov Institute for Theoretical PhysicsUA21 papers
- ETH ZurichCH21 papers
43 papers · 1 filter
Interactions of Parametrically Driven Dark Solitons. I: Néel-Néel and Bloch-Bloch interactions
I. V. Barashenkov, S. R. Woodford, E. V. Zemlyanaya
We study interactions between the dark solitons of the parametrically driven nonlinear Schrödinger equation, Eq.(\ref{NLS}). When the driving strength, , is below $\sqrt{γ^2 +1/…
Almost del Pezzo manifolds
Priska Jahnke, Thomas Peternell
We classify almost del Pezzo manifolds in arbitrary dimension n, i.e., projective manifolds X with big and nef anticanonical bundle -K_X, such that -K_X is divisible by n-1.
Global existence for the spherically symmetric Einstein-Vlasov system with outgoing matter
Hakan Andreasson, Markus Kunze, Gerhard Rein
We prove a new global existence result for the asymptotically flat, spherically symmetric Einstein-Vlasov system which describes in the framework of general relativity an ensemble…
Explicit n-descent on elliptic curves, II. Geometry
John Cremona, Tom Fisher, Cathy O'Neil +2
This is the second in a series of papers in which we study the n-Selmer group of an elliptic curve. In this paper, we show how to realize elements of the n-Selmer group explicitly…
Double Kodaira fibrations
Fabrizio Catanese, Soenke Rollenske
The existence of a Kodaira fibration, i.e., of a fibration of a compact complex surface onto a complex curve which is a differentiable but not a holomorphic bundle, forces…
On the steady states of the spherically symmetric Einstein-Vlasov system
Hakan Andreasson, Gerhard Rein
Using both numerical and analytical tools we study various features of static, spherically symmetric solutions of the Einstein-Vlasov system. In particular, we investigate the poss…
Coherent amplitudon generation in K_0.3MoO_3 through ultrafast inter-band quasi particle decay
D. M. Sagar, A. A. Tsvetkov, D. Fausti +2
The charge density wave system K_0.3MoO_3 has been studied using variable energy pump-probe spectroscopy, ellipsometry, and inelastic light scattering. The observed transient refle…
The classification of surfaces with p_g = q = 0 isogenous to a product of curves
Ingrid Bauer, Fabrizio Catanese, Fritz Grunewald
We classify all the surfaces with p_g = q = 0 which admit an unramified covering which is isomorphic to a product of curves. Beyond the trivial case \PP^1 x \PP^1 we find 17 famili…
One-dimensional versus two-dimensional correlation effects in the oxyhalides TiOCl and TiOBr
M. Hoinkis, M. Sing, S. Glawion +6
We have performed a comparative study of the electronic structures of the spin-Peierls systems TiOCl and TiOBr by means of photoemission spectroscopy and density functional calcula…
A versatile maskless microscope projection photolithography system and its application in light-directed fabrication of DNA microarrays
Thomas Naiser, Timo Mai, Wolfgang Michel +1
We present a maskless microscope projection lithography system (MPLS), in which photomasks have been replaced by a Digital Micromirror Device type spatial light modulator (DMD, Tex…
Optimization of soliton ratchets in inhomogeneous sine-Gordon systems
F. G. Mertens, L. Morales-Molina, A. R. Bishop +2
Unidirectional motion of solitons can take place, although the applied force has zero average in time, when the spatial symmetry is broken by introducing a potential , which…
The effects of the symmetric and antisymmetric anisotropies on the dynamics of the spin-1/2 XY chain
O. Derzhko, T. Verkholyak, T. Krokhmalskii +1
The dynamic properties of the spin-1/2 anisotropic XY chain with the Dzyaloshinskii-Moriya (DM) interaction in a transverse field are investigated. Using the Jordan-Wigner transfor…
Fundamental Groups of Spaces of Smooth Projective Hypersurfaces
Michael Lönne
We investigate the complement of the discriminant in the projective space PSym^d C^{n+1} of polynomials defining hypersurfaces of degree d in P^n. Following the ideas of Zariski we…
Long-range effects on superdiffusive solitons in anharmonic chains
C. Brunhuber, F. G. Mertens, Y. Gaididei
Studies on thermal diffusion of lattice solitons in Fermi-Pasta-Ulam (FPU)-like lattices were recently generalized to the case of dispersive long-range interactions (LRI) of the Ka…
Thermal diffusion of solitons on anharmonic chains with long-range coupling
C. Brunhuber, F. G. Mertens, Y. Gaididei
We extend our studies of thermal diffusion of non-topological solitons to anharmonic FPU-type chains with additional long-range couplings. The observed superdiffusive behavior in t…
Canonical symplectic structures and deformations of algebraic surfaces
Fabrizio Catanese
We show that a minimal surface of general type has a canonical symplectic structure (unique up to symplectomorphism) which is invariant for smooth deformation. We show that the sym…
A volume maximizing canonical surface in 3-space
Ingrid Bauer, Fabrizio Catanese
Answering a question posed by Enriques, we construct a minimal smooth algebraic surface of general type over the complex numbers with and , and with biratio…
Via Hexagons to Squares in Ferrofluids: Experiments on Hysteretic Surface Transformations under Variation of the Normal Magnetic Field
Christian Gollwitzer, Ingo Rehberg, Reinhard Richter
We report on different surface patterns on magnetic liquids following the Rosensweig instability. We compare the bifurcation from the flat surface to a hexagonal array of spikes wi…
Vortex polarity switching by a spin--polarized current
Jean-Guy Caputo, Yuri Gaididei, Franz G. Mertens +1
The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field perpendicular to the na…
Particles held by springs in a linear shear flow exhibit oscillatory motion
Lukas Holzer, Walter Zimmermann
The dynamics of small spheres, which are held by linear springs in a low Reynolds number shear flow at neighboring locations is investigated. The flow elongates the beads and the i…
Bifurcations of discrete breathers in a diatomic Fermi-Pasta-Ulam chain
Guillaume James, Michael Kastner
Discrete breathers are time-periodic, spatially localized solutions of the equations of motion for a system of classical degrees of freedom interacting on a lattice. Such solutions…
Chebycheff and Belyi polynomials, dessins d'enfants, Beauville surfaces and group theory
Ingrid Bauer, Fabrizio Catanese, Fritz Grunewald
We start discussing the group of automorphisms of the field of complex numbers, and describe, in the special case of polynomials with only two critical values, Grothendieck's progr…
Enumeration of generalized polyominoes
Matthias Koch, Sascha Kurz
As a generalization of polyominoes we consider edge-to-edge connected nonoverlapping unions of regular -gons. For we determine formulas for the number of gener…
Nonanalyticities of entropy functions of finite and infinite systems
Lapo Casetti, Michael Kastner
In contrast to the canonical ensemble where thermodynamic functions are smooth for all finite system sizes, the microcanonical entropy can show nonanalytic points also for finite s…