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
47 papers · 1 filter
Growth of surface undulations at the Rosensweig instability
Holger Knieling, Reinhard Richter, Ingo Rehberg +2
We investigate the growth of a pattern of liquid crests emerging in a layer of magnetic liquid when subjected to a magnetic field oriented normally to the fluid surface. After a st…
A Raman study of the Charge-Density-Wave State in AMoO (A = K,Rb)
D. M. Sagar, D. Fausti, S. Yue +3
We report a comparative Raman spectroscopic study of the quasi-one-dimensional charge-density-wave systems \ab (A = K, Rb). The temperature and polarization dependent experiments r…
Dynamic probes of quantum spin chains with the Dzyaloshinskii-Moriya interaction
Oleg Derzhko, Taras Verkholyak, Taras Krokhmalskii +1
We consider the spin-1/2 anisotropic XY chain in a transverse (z) field with the Dzyaloshinskii-Moriya interaction directed along z-axis in spin space to examine the effect of the…
Coherent backscattering of light from saturated atoms
Vyacheslav Shatokhin, Thomas Wellens, Cord Müller +1
We survey recent progress achieved in understanding the impact of inelastic processes on coherent backscattering of light from cold atoms that are saturated by a powerful laser fie…
Information and entropy in quantum Brownian motion: Thermodynamic entropy versus von Neumann entropy
Christian Hoerhammer, Helmut Buettner
We compare the thermodynamic entropy of a quantum Brownian oscillator derived from the partition function of the subsystem with the von Neumann entropy of its reduced density matri…
Use of resonance Raman spectroscopy to study the phase diagram of PbZr0.52Ti0.48O3
Jerome Rouquette, Julien Haines, Véronique Bornand +3
Evidence is presented for the first time that the sharp and continuous spectral changes observed in PbZr0.52Ti0.48O3 (PZT) between 350 and 10 K with the 647.1 nm wavelength are due…
Phase transitions induced by saddle points of vanishing curvature
Michael Kastner, Oliver Schnetz
Based on the study of saddle points of the potential energy landscapes of generic classical many-particle systems, we present a necessary criterion for the occurrence of a thermody…
Controllable switching of vortex chirality in magnetic nanodisks by a field pulse
Yuri Gaididei, Denis D. Sheka, Franz G. Mertens
We propose a way of fast switching the chirality in a magnetic nanodisk by applying a field pulse. To break the symmetry with respect to clockwise or counterclockwise chirality a m…
Pressure-induced metallization and structural phase transition of the Mott-Hubbard insulator TiOBr
C. A. Kuntscher, S. Frank, A. Pashkin +9
We investigated the pressure-dependent optical response of the low-dimensional Mott-Hubbard insulator TiOBr by transmittance and reflectance measurements in the infrared and visibl…
Lateral migration of a 2D vesicle in unbounded Poiseuille flow
B. Kaoui, G. H. Ristow, I. Cantat +2
The migration of a suspended vesicle in an unbounded Poiseuille flow is investigated numerically in the low Reynolds number limit. We consider the situation without viscosity contr…
The yoga of the Cassels-Tate pairing
Tom Fisher, Edward F. Schaefer, Michael Stoll
Cassels has described a pairing on the 2-Selmer group of an elliptic curve which shares some properties with the Cassels-Tate pairing. In this article, we prove that the two pairin…
Entanglement Witnesses from Single-Particle Interference
T. Scholak, F. Mintert, C. A. Müller
We describe a general method of realizing entanglement witnesses in terms of the interference pattern of a single quantum probe. After outlining the principle, we discuss specific…
On tameness and growth conditions
Joerg Winkelmann
We study discrete subsets of C^d, relating "tameness" with growth conditions.
Environment-induced two-mode entanglement in quantum Brownian motion
C. Hoerhammer, H. Buettner
The time evolution of quantum correlations of entangled two-mode continuous variable states is examined in single-reservoir as well as two-reservoir models, representing noisy corr…
Prediction of polar ordered oxynitride perovskites
Razvan Caracas, R. E. Cohen
Using a materials by design approach, the authors find a class of ordered oxynitride piezoelectrics with perovskite structure. They predict that ordered YSiO2N and YGeO2N are chara…
Coefficient of tangential restitution for the linear dashpot model
Volker Becker, Thomas Schwager, Thorsten Poeschel
The linear dashpot model for the inelastic normal force between colliding spheres leads to a constant coefficient of normal restitution, const., which makes this model very p…
Photoelectron spectra of anionic sodium clusters from time-dependent density-functional theory in real-time
Michael Mundt, Stephan Kümmel
We calculate the excitation energies of small neutral sodium clusters in the framework of time-dependent density-functional theory. In the presented calculations, we extract these…
Coefficient of Restitution for Viscoelastic Spheres: The Effect of Delayed Recovery
Thomas Schwager, Thorsten Poeschel
The coefficient of normal restitution of colliding viscoelastic spheres is computed as a function of the material properties and the impact velocity. From simple arguments it becom…
Electrical response of molecular systems: the power of self-interaction corrected Kohn-Sham theory
T. Körzdörfer, M. Mundt, S. Kümmel
The accurate prediction of electronic response properties of extended molecular systems has been a challenge for conventional, explicit density functionals. We demonstrate that a s…
Diffusive spin transport
Cord A. Mueller
Information to be stored and transported requires physical carriers. The quantum bit of information (qubit) can for instance be realised as the spin 1/2 degree of freedom of a mass…
Compact Manifolds Covered by a Torus
Jean-Pierre Demailly, Jun-Muk Hwang, Thomas Peternell
Let be a connected compact complex manifold admitting a finite surjective map from a complex torus We prove that up to finite étale cover, is a product of pr…
Switching of the vortex polarity in a magnetic nanodisk by a DC current
Denis D. Sheka, Yuri Gaididei, Franz G. Mertens
We study the dynamics of a vortex state nanodisk due to a dc spin current, perpendicular to the disk plane. The irreversible switching of the vortex polarity takes place above some…
The absolute Galois group acts faithfully on the connected components of the moduli space of surfaces of general type
Ingrid Bauer, Fabrizio Catanese, Fritz Grunewald
We show that the Galois group $Gal(\bar{\Q} /\Q)$ operates faithfully on the set of connected components of the moduli spaces of surfaces of general type, and also that for each el…
Single cell mechanics: stress stiffening and kinematic hardening
Pablo Fernández, Albrecht Ott
Cell mechanical properties are fundamental to the organism but remain poorly understood. We report a comprehensive phenomenological framework for the nonlinear rheology of single f…