Results 171 to 180 of about 32,417 (187)

Dynamical tunnelling of ultracold atoms

Nature, 2001
The divergence of quantum and classical descriptions of particle motion is clearly apparent in quantum tunnelling between two regions of classically stable motion. An archetype of such non-classical motion is tunnelling through an energy barrier. In the 1980s, a new process, 'dynamical' tunnelling, was predicted, involving no potential energy barrier ...
Hensinger, W. K., Haffer, H., Browaeys, A., Heckenberg, N. R., Helmerson, K., McKenzie, C., Milburn, G. J., Phillips, W. D., Rolston, S. L., Rubinsztein-Dunlop, H., Upcroft, B.   +10 more
openaire   +3 more sources

Photoassociation of Ultracold Sodium Atoms

Physica Scripta, 2003
Using ultra-cold atoms a new technique of photoassociation spectroscopy has been developed. The technique has an unprecedented resolution and can be used to obtain high-resolution data on singly and doubly excited states of diatomic molecules. We describe the principle of the technique and show results for one specific case, namely the Na2 molecule.
Amelink, A., van der Straten, P.
openaire   +1 more source

Ultracold atom-ion collisions

Physical Review A, 2000
Studies of charge transfer and total cross sections in elastic collisions of atom-ion alkali metals at ultralow temperatures are reported. Calculations for Na+Na{sup +} have been carried out with the best available {sup 2}{sigma}{sub g}{sup +} and {sup 2}{sigma}{sub u}{sup +} potential curves.
R. Côté, A. Dalgarno
openaire   +1 more source

Dynamical localization of ultracold sodium atoms

Physical Review E, 1999
We report a study of atomic motion in time-dependent optical potentials. We measure momentum transfer in parameter regimes for which the classical dynamics are chaotic, and observe the quantum suppression of chaos by dynamical localization. The high degree of control over the experimental parameters enables detailed comparisons with theoretical ...
C F, Bharucha, J C, Robinson, F L, Moore, B, Sundaram, Q, Niu, M G, Raizen   +5 more
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Optical circuit compactification for ultracold atoms

Review of Scientific Instruments
We develop a modular and compactified optical circuit for the generation of optical beams for cooling, imaging, and controlling ultracold atoms. One of the simplifications that is made in our circuit is to admix the repumping beams to each other optical beams in its dedicated single-mode fiber. We implement our design, characterize the output, and show
Manikandan Kondappan, Valentin Ivannikov, Tim Byrnes   +2 more
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Ultracold Rydberg Atom–Atom Interaction

2023
openaire   +1 more source

Ultracold atom lattices

Nature Photonics, 2016
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Ultracold atoms and atomic optics

Physics-Uspekhi, 2011
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Nonlinear atomic cavity for ultracold atoms

Technical Digest. CLEO/Pacific Rim'95. The Pacific Rim Conference on Lasers and Electro-Optics, 2005
null Weiping Zhang, P. Meystre, E.M. Wright   +2 more
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Ultracold atomic interactions

Proceedings of the International School of Physics “Enrico Fermi”
openaire   +1 more source