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40 papers · 1 filter
A two-dimensional, two-electron model atom in a laser pulse: exact treatment, single active electron-analysis, time-dependent density functional theory, classical calculations, and non-sequential ionization
D. Bauer
Owing to its numerical simplicity, a two-dimensional two-electron model atom, with each electron moving in one direction, is an ideal system to study non-perturbatively a fully cor…
Quantum Mechanics and Semiclassics of Hyperbolic n-Disk Scattering Systems
Andreas Wirzba
The scattering problems of a scalar point particle from a finite assembly of n>1 non-overlapping and disconnected hard disks, fixed in the two-dimensional plane, belong to the simp…
Evidence for Different Freeze-Out Radii of High- and Low-Energy Pions Emitted in Au+Au Collisions at 1 GeV/nucleon
A. Wagner, C. Müntz, H. Oeschler +20
Double differential production cross sections of negative and positive pions and the number of participating protons have been measured in central Au+Au collisions at 1 GeV per nuc…
Various Shades of Blue's Functions
Romuald A. Janik, Maciej A. Nowak, Gabor Papp +1
We discuss random matrix models in terms of elementary operations on Blue's functions (functional inverse of Green's functions). We show that such operations embody the essence of…
Towards a Complete Calculation of
Edward Boos, Thorsten Ohl
We present a general classification of all four fermion final states in ~collisions and a calculation of cross sections below the -threshold.
Interference of a first-order transition with the formation of a spin-Peierls state in alpha'-NaV2O5?
M. Koeppen, D. Pankert, R. Hauptmann +4
We present results of high-resolution thermal-expansion and specific-heat measurements on single crystalline alpha'-NaV2O5. We find clear evidence for two almost degenerate phase t…