2002/09/04 by J. Steinhauer, Jeff Steinhauer, Nadav Katz +7 · 8 citations
Physics and Astronomy · #Atomic physics #Bose–Einstein condensate #Bragg's law #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Diffraction #Measure (data warehouse) #Momentum (technical analysis) #Phonon #Photon #Physics #Pulse (music) #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Spectroscopy #Spectrum (functional analysis) #Strong Light-Matter Interactions #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.90.060404
arxiv created 2002/09/04 · openalex publication_date 2003/02/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We measure the response of an elongated Bose-Einstein condensate to a two-photon Bragg pulse. If the duration of the pulse is long, the total momentum transferred to the condensate exhibits a nontrivial behavior which reflects the structure of the underlying Bogoliubov spectrum. It is thus possible to perform a spectroscopic analysis in which axial phonons with a different number of radial nodes are resolved. The local density approximation is shown to fail in this regime, while the observed data agree well with the results of simulations based on the numerical solution of the Gross-Pitaevskii equation.