Collective Excitations of a Bose-Einstein Condensate in a Dilute Gas

1996/07/15 by D. S. Jin, J. R. Ensher, M. R. Matthews +2 · 7 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Advanced Frequency and Time Standards

paper · doi:10.1103/physrevlett.77.420

openalex publication_date 1996/07/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/22

Abstract

We observe phononlike excitations of a Bose-Einstein condensate (BEC) in a dilute atomic gas. ⁸⁷Rb atoms are optically trapped and precooled, loaded into a magnetic trap, and then evaporatively cooled through the BEC phase transition to form a condensate. We excite the condensate by applying an inhomogeneous oscillatory force with adjustable frequency and symmetry. We have observed modes with different angular momenta and different energies and have studied how their characteristics depend on interaction energy. We find that the condensate excitations persist longer than their counterparts in uncondensed clouds.

Citations

• Bosons in anisotropic traps: Ground state and vortices
• Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor
• Bose-Einstein Condensation in a Gas of Sodium Atoms

Cited by

• Circuit QED lattices: Towards quantum simulation with superconducting circuits
• Excitation spectroscopy of vortex states in dilute Bose-Einstein condensed gases
• Loss of superfluidity in a Bose–Einstein condensate via forced resonant oscillations
• Probing dipolar effects with condensate shape oscillation
• A gapless theory of Bose-Einstein condensation in dilute gases at finite temperature
• Output coupling of a Bose-Einstein condensate formed in a TOP trap
• Bose–Einstein condensate [wikipedia]