Mapping out the quasicondensate transition through the dimensional crossover from one to three dimensions

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.021605· OSTI ID:21537102

Armijo, J; Jacqmin, T; Bouchoule, I ^[1]; Kheruntsyan, K ^[2]

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1. Laboratoire Charles Fabry, UMR 8501 du CNRS, Institut d'Optique, F-91127 Palaiseau Cedex (France)
2. 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, Journal Name: Physical Review. A Journal Issue: 2 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN GAS
DENSITY
FLUCTUATIONS
INTERACTIONS
MAPPING
ONE-DIMENSIONAL CALCULATIONS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
THREE-DIMENSIONAL CALCULATIONS
VARIATIONS
YANG THEOREM