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The stability of metal clusters M n sputtered from single-crystal surfaces by keV and sub-keV Ar + ions was investigated by a molecular-dynamics (MD) simulation using a many-body embedded-atom… (More)

A quantum version of the classical paraxial approximation is established. After expanding the classical free-field wave equation in powers of {theta} (the characteristic opening angle of the paraxial… (More)

We consider two-photon bound states which may be excited in a planar waveguide filled with a self-focusing Kerr material. These bound states are the quantum analogs of the classical light bullets… (More)

Previous polarized electron experiments and recent {ital ab} {ital initio} calculations suggest that the surface layer magnetic moments of Gd(0001) are antiferromagnetically coupled to the bulk… (More)

Two theorems on the group velocity are presented in this paper. First a simple proof is given that for any dispersive dielectric, there must be a frequency at which the group velocity of an… (More)

For a pulse with carrier frequency detuned less than an atomic plasma frequency but outside a narrow Lorentzian gain line, the group velocity will be negative. Unlike propagation at the center of an… (More)

We propose a high-[ital Q] Fabry-Perot resonator with cylindrical mirrors, operating near fundamental mode and filled with an alkali vapor, as the photonic analog to the electronic quantum wire. The… (More)

The macroscopic wave function for atomic samples composed of a few thousand particles is shown to exhibit collapses and revivals on a few seconds time scale, while Bose-Einstein condensation remains… (More)

- Rosencrance, Burnham, +5 authors DePristo
- Physical review. B, Condensed matter
- 1995

- Massimiliano Cocca, Marc Pybus, +12 authors Vincenza Colonna
- 2015

10 1. Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy 2. Institut de Biologia Evolutiva (UPF-CSIC), Universitat Pompeu Fabra, Barcelona, Spain, 08003… (More)