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13 papers · 2 filters
A high-accuracy optical clock via three-level coherence in neutral bosonic Sr
Robin Santra, Ennio Arimondo, Tetsuya Ido +2
An optical atomic clock scheme is developed that utilizes two lasers to establish coherent coupling between the ground state of Sr and the first excit…
Influence of magnetic fields on cold collisions of polar molecules
Christopher Ticknor, John L. Bohn
We consider cold collisions of OH molecules in the grounds state, under the influnce of a magnetic field. We find that modest fields of several thousand gauss can act t…
Precision spectroscopy and density-dependent frequency shifts in ultracold Sr
Tetsuya Ido, Thomas H. Loftus, Martin M. Boyd +3
By varying the density of an ultracold Sr sample from cm to cm, we make the first definitive measurement of the density-related frequency sh…
Ultracold Collisions of Fermionic OD Radicals
A. V. Avdeenkov, J. L. Bohn
We discuss consequences of Fermi exchange symmetry on collisions of polar molecules at low temperatures (below 1 K), considering the OD radical as a prototype. At low fields and lo…
Multiphoton ionization of xenon in the VUV regime
Robin Santra, Chris H. Greene
In a recent experiment at the VUV free-electron laser facility at DESY in Hamburg, the generation of multiply charged ions in a gas of atomic xenon was observed. This paper develop…
Siegert pseudostates: completeness and time evolution
Robin Santra, Jeffrey M. Shainline, Chris H. Greene
Within the theory of Siegert pseudostates, it is possible to accurately calculate bound states and resonances. The energy continuum is replaced by a discrete set of states. Many qu…