Dynamical tunnelling of ultracold atoms

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. and Upcroft, B. (2001) Dynamical tunnelling of ultracold atoms. Nature, 412 6842: 52-55. doi:10.1038/35083510

Author 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.
Title Dynamical tunnelling of ultracold atoms
Journal name Nature   Check publisher's open access policy
ISSN 0028-0836
Publication date 2001-01-01
Year available 2001
Sub-type Article (original research)
DOI 10.1038/35083510
Open Access Status DOI
Volume 412
Issue 6842
Start page 52
End page 55
Total pages 4
Place of publication United Kingdom
Publisher Nature Publishing Group
Language eng
Subject C1
240402 Quantum Optics and Lasers
780102 Physical sciences
Abstract The divergence of quantum and classical descriptions of particle motion is clearly apparent in quantum tunnelling(1,2) between two regions of classically stable motion. An archetype of such nonclassical motion is tunnelling through an energy barrier. In the 1980s, a new process, 'dynamical' tunnelling(1-3), was predicted, involving no potential energy barrier; however, a constant of the motion (other than energy) still forbids classically the quantum-allowed motion. This process should occur, for example, in periodically driven, nonlinear hamiltonian systems with one degree of freedom(4-6). Such systems may be chaotic, consisting of regions in phase space of stable, regular motion embedded in a sea of chaos. Previous studies predicted(4) dynamical tunnelling between these stable regions. Here we observe dynamical tunnelling of ultracold atoms from a Bose-Einstein condensate in an amplitude-modulated optical standing wave. Atoms coherently tunnel back and forth between their initial state of oscillatory motion (corresponding to an island of regular motion) and the state oscillating 180 degrees out of phase with the initial state.
Keyword quantum optics
atom optics
quantum tunnelling
Q-Index Code C1
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
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Created: Wed, 15 Aug 2007, 02:01:45 EST