Bragg Spectroscopy of a Strongly Interacting {sup 85}Rb Bose-Einstein Condensate

Journal Article · Fri Sep 26 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.135301· OSTI ID:21179758

Papp, S B; Pino, J M; Wild, R J; Ronen, S; Jin, D S; Cornell, E A ^[1]; Wieman, C E ^[2]

---

1. JILA, Quantum Physics Division, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440 (United States)
2. University of British Colombia, Vancouver, British Columbia V6T 1Z1 (Canada)

We report on measurements of the excitation spectrum of a strongly interacting Bose-Einstein condensate. A magnetic-field Feshbach resonance is used to tune atom-atom interactions in the condensate and to reach a regime where quantum depletion and beyond mean-field corrections to the condensate chemical potential are significant. We use two-photon Bragg spectroscopy to probe the condensate excitation spectrum; our results demonstrate the onset of beyond mean-field effects in a gaseous Bose-Einstein condensate.

• OSTI ID: 21179758
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
EXCITATION
MAGNETIC FIELDS
MEAN-FIELD THEORY
PHOTONS
RUBIDIUM 85
SPECTROSCOPY