Phase-Fluctuating 3D Bose-Einstein Condensates in Elongated Traps

2001/04/26 by D. S. Petrov, G. V. Shlyapnikov, J. T. M. Walraven · 7 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevlett.87.050404

published as Phys. Rev. Lett. 87, 050404 (2001) · 5 pages REVTeX, 3 figures, misprints corrected

arxiv created 2001/04/26 · openalex publication_date 2001/07/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We find that in very elongated 3D trapped Bose gases, even at temperatures far below the BEC transition temperature T(c), the equilibrium state will be a 3D condensate with fluctuating phase (quasicondensate). At sufficiently low temperatures the phase fluctuations are suppressed and the quasicondensate turns into a true condensate. The presence of the phase fluctuations allows for extending thermometry of Bose-condensed gases well below those established in current experiments.

Citations

• Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor

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