Light-shift tomography in an optical-dipole trap for neutral atoms

2008/07/23 by Jean-Philippe Brantut, Jean‐François Clément, Jean-François Clément +8 · 27 citations
Physics and Astronomy · #Absorption (acoustics) #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Dipole #Excited state #Optics #Physics #Thermalisation #Trap (plumbing) #physics.atom-ph

paper · pdf · doi:10.1103/physreva.78.031401

published in Physical Review A 78(3) (American Physical Society)

arxiv created 2008/07/23 · openalex publication_date 2008/09/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on light-shift tomography of a cloud of ⁸⁷Rb atoms in a far-detuned optical-dipole trap at 1565\phantom\rule0.3em0exnm. Our method is based on standard absorption imaging, but takes advantage of the strong light shift of the excited state of the imaging transition, which is due to a quasiresonance of the trapping laser with a higher excited level. We use this method to (i) map the equipotentials of a crossed optical-dipole trap and (ii) study the thermalization of an atomic cloud by following the evolution of the potential energy of atoms during the free-evaporation process.

Citations

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