Mapping out the quasicondensate transition through the dimensional crossover from one to three dimensions
- Laboratoire Charles Fabry, UMR 8501 du CNRS, Institut d'Optique, F-91127 Palaiseau Cedex (France)
- ARC Centre of Excellence for Quantum-Atom Optics, School of Physical Sciences, University of Queensland, Brisbane, Queensland 4072 (Australia)
By measuring the density fluctuations in a highly elongated weakly interacting Bose gas, we observe and quantify the transition from the ideal gas to a quasicondensate regime throughout the dimensional crossover from a purely one-dimensional (1D) to an almost three-dimensional (3D) gas. We show that that the entire transition region and the dimensional crossover are described surprisingly well by the modified Yang-Yang model. Furthermore, we find that at low temperatures the linear density at the quasicondensate transition scales according to an interaction-driven scenario of a longitudinally uniform 1D Bose gas, whereas at high temperatures it scales according to the degeneracy-driven critical scenario of transverse condensation of a 3D ideal gas.
- OSTI ID:
- 21537102
- Journal Information:
- Physical Review. A, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevA.83.021605; (c) 2011 American Institute of Physics; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN GAS
DENSITY
FLUCTUATIONS
INTERACTIONS
MAPPING
ONE-DIMENSIONAL CALCULATIONS
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
THREE-DIMENSIONAL CALCULATIONS
YANG THEOREM
PHYSICAL PROPERTIES
TEMPERATURE RANGE
VARIATIONS