Zobrazeno 1 - 10
of 303
pro vyhledávání: '"Leschhorn, A."'
Autor:
Mielenz, M., Landa, H., Brox, J., Kahra, S., Leschhorn, G., Albert, M., Reznik, B., Schaetz, T.
We study experimentally and theoretically structural defects which are formed during the transition from a laser cooled cloud to a Coulomb crystal, consisting of tens of ions in a linear radio frequency trap. We demonstrate the creation of predicted
Externí odkaz:
http://arxiv.org/abs/1211.6867
We present the preparation and deterministic delivery of a selectable number of externally cold molecular ions. A laser cooled ensemble of Mg^+ ions subsequently confined in several linear Paul traps inter-connected via a quadrupole guide serves as a
Externí odkaz:
http://arxiv.org/abs/1110.4254
Two efficient and isotope-selective resonant two-photon ionization techniques for loading barium ions into radio-frequency (RF)-traps are demonstrated. The scheme of using a strong dipole-allowed transition at \lambda=553 nm as a first step towards i
Externí odkaz:
http://arxiv.org/abs/1110.4040
The influence of polydispersity on the magnetization is analyzed in a nonequilibrium situation where a cylindrical ferrofluid column is enforced to rotate with constant frequency like a rigid body in a homogeneous magnetic field that is applied perpe
Externí odkaz:
http://arxiv.org/abs/physics/0608033
Autor:
Leschhorn, A., Lücke, M.
Publikováno v:
Z. Phys. Chem. 220 (2006) 89-96
We investigate a torsional pendulum containing a ferrofluid that is forced periodically to undergo small-amplitude oscillations. A homogeneous magnetic field is applied perpendicular to the pendulum axis. We give an analytical formula for the ferrofl
Externí odkaz:
http://arxiv.org/abs/physics/0608037
Autor:
Leschhorn, A., Lücke, M.
Publikováno v:
Z. Phys. Chem. 220 (2006) 219-224
We consider a ferrofluid cylinder, that is rotating with constant rotation frequency \Omega e_z as a rigid body. A homogeneous magnetic field H_0 e_x is applied perpendicular to the cylinder axis e_z. This causes a nonequilibrium situation. Therein t
Externí odkaz:
http://arxiv.org/abs/physics/0505022
Autor:
Buldyrev, S. V., Amaral, L. A. N., Havlin, S., Leschhorn, H., Maass, P., Salinger, M. A., Stanley, H. E., Stanley, M. H. R.
In the preceding paper we presented empirical results describing the growth of publicly-traded United States manufacturing firms within the years 1974--1993. Our results suggest that the data can be described by a scaling approach. Here, we propose m
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702085
Autor:
Amaral, L. A. N., Buldyrev, S. V., Havlin, S., Leschhorn, H., Maass, P., Salinger, M. A., Stanley, H. E., Stanley, M. H. R.
We address the question of the growth of firm size. To this end, we analyze the Compustat data base comprising all publicly-traded United States manufacturing firms within the years 1974-1993. We find that the distribution of firm sizes remains stabl
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702082
We introduce a model describing the paths that pin an elastic interface moving in a disordered medium. We find that the scaling properties of these ``elastic pinning paths'' (EPP) are different from paths embedded on a directed percolation cluster, w
Externí odkaz:
http://arxiv.org/abs/cond-mat/9608033
Autor:
Leschhorn, Heiko
We study numerically a stochastic differential equation describing an interface driven along the hard direction of an anisotropic random medium. The interface is subject to a homogeneous driving force, random pinning forces and the surface tension. I
Externí odkaz:
http://arxiv.org/abs/cond-mat/9605018