Work

First and Second Sound Modes of a Bose-Einstein Condensate in a Harmonic Trap

Year: 1998

Type: article

Abstract: We have calculated the first and second sound modes of a dilute interacting Bose gas in a spherical trap for temperatures $(0.6<{T/T}_{c}<1.2)$ and for systems with ${10}^{4}$ to ${10}^{8}$ particles. The second sound modes (which exist only below ${T}_{c}$) generally have a stronger temperature dependence than the first sound modes. The puzzling temperature variations of the sound modes near ${T}_{c}$ recently observed at JILA in systems with ${10}^{3}$ particles match surprisingly well with those of the first and second sound modes of much larger systems.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.80.3895

Authors: V. B. Shenoy, Tin-Lun Ho

Institution: The Ohio State University

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, California Institute of Technology, Division of Materials Research

Award: Properties of Superfluid Three Helium in Novel Porous Media at Very Low Temperatures