Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review A

Dimensional reduction in Bose-Einstein-condensed alkali-metal vapors (4 pages)

Luca Salasnich

Published Jan 1, 2004• 0 citations
OpenAlex

Related papers

The creation and study of Bose-Einstein condensation in a cold alkali vapor

Carl Wieman, Eric Cornell, D. S. Jin +6 more

•Jan 1, 1997•0 citations

Observation and study of Bose-Einstein condensation in a cold alkali vapor

Carl Wieman

Journal of the Korean Physical Society•Jan 1, 1996•0 citations

TOPOLOGICAL VORTEX FORMATION IN A BOSE-EINSTEIN CONDENSATE OF ALKALI-METAL ATOMS

Mikio Nakahara

International Symposium on Topology in Ordered Phases•Aug 1, 2006•0 citations

Dimensional reduction in Bose-Einstein-condensed alkali-metal vapors

Luca Salasnich, Alberto Parola, L. Reatto

We investigate the effects of dimensional reduction in atomic Bose-Einstein condensates (BECs) induced by a strong harmonic confinement in the cylindric radial direction or in the cylindric axial direction. The former case corresponds to a transition from three dimensions (3D) to 1D in cigar-shaped BECs, while the latter case corresponds to a transition from 3D to 2D in disk-shaped BECs. We analyze the first sound velocity in axially homogeneous cigar-shaped BECs and in radially homogeneous disk-shaped BECs. We consider also the dimensional reduction in a BEC confined by a harmonic potential both in the radial direction and in the axial direction. By using a variational approach, we calculate monopole and quadrupole collective oscillations of the BEC. We find that the frequencies of these collective oscillations are related to the dimensionality and to the repulsive or attractive interatomic interaction.

arXiv:cond-mat/0402128•Physical Review A•Apr 5, 2004•44 citations

Analysis of hydrogen Bose-Einstein condensate growth data

Crispin W. Gardiner, A. Norrie

Summary form only given. The atomic hydrogen BEC is of a rather different kind from those prevalent in the now almost ubiquitous alkali-metal vapor condensates. The characteristic features of the hydrogen system are: 1. The condensate fraction is rather low, typically about 5%; 2. The number of atoms in the condensate is nevertheless very large, /spl ap/10/sup 9/, compared to /spl ap/10/sup 6/ for Na condensates and /spl ap/10/sup 5/ for Rb condensates; 3. The hydrogen condensate at MIT is a hot condensate formed with radial and axial trap frequencies; giving a trap aspect ratio of an almost one-dimensional condensate. 4. Because of the rather small scattering length of hydrogen, the condensate density is very much higher than in the alkali-metal condensates, and experimentally is measured spectroscopically using the cold-collision frequency shift for the 1S-2S two-photon transition. 5. The condensate would decay rather rapidly by two body dipolar relaxation processes, but is maintained by being fed from the very large number of noncondensate atoms. The system is thus not in thermodynamic equilibrium.

Quantum Electronics and Laser Science Conference•Nov 13, 2002•0 citations

Hyperfine Physics in Alkali-Metal Vapors

Brian T. Saam

Bulletin of the American Physical Society•Jun 2, 2018•0 citations
We investigate the effects of dimensional reduction in atomic Bose-Einstein condensates (BECs) induced by a strong harmonic confinement in the cylindric radial direction or in the cylindric axial direction. The former case corresponds to a transition from three dimensions (3D) to 1D in cigar-shaped BECs, while the latter case corresponds to a transition from 3D to 2D in disk-shaped BECs. We analyze the first sound velocity in axially homogeneous cigar-shaped BECs and in radially homogeneous disk-shaped BECs. We consider also the dimensional reduction in a BEC confined by a harmonic potential both in the radial direction and in the axial direction. By using a variational approach, we calculate monopole and quadrupole collective oscillations of the BEC. We find that the frequencies of these collective oscillations are related to the dimensionality and to the repulsive or attractive interatomic interaction.
Summary form only given. The atomic hydrogen BEC is of a rather different kind from those prevalent in the now almost ubiquitous alkali-metal vapor condensates. The characteristic features of the hydrogen system are: 1. The condensate fraction is rather low, typically about 5%; 2. The number of atoms in the condensate is nevertheless very large, /spl ap/10/sup 9/, compared to /spl ap/10/sup 6/ for Na condensates and /spl ap/10/sup 5/ for Rb condensates; 3. The hydrogen condensate at MIT is a hot condensate formed with radial and axial trap frequencies; giving a trap aspect ratio of an almost one-dimensional condensate. 4. Because of the rather small scattering length of hydrogen, the condensate density is very much higher than in the alkali-metal condensates, and experimentally is measured spectroscopically using the cold-collision frequency shift for the 1S-2S two-photon transition. 5. The condensate would decay rather rapidly by two body dipolar relaxation processes, but is maintained by being fed from the very large number of noncondensate atoms. The system is thus not in thermodynamic equilibrium.