Splitting in the Excitation Spectrum of A Bose-Einstein Condensate Undergoing Strong Rabi Oscillations
arXiv:cond-mat/0402225 · doi:10.1103/PhysRevA.72.053614
Abstract
We report on a measurement of splitting in the excitation spectrum of a condensate driven by an optical travelling wave. Experimental results are compared to a numerical solution of the Gross Pitaevskii equation, and analyzed by a simple two level model and by the more complete band theory, treating the driving beams as an optical lattice. In this picture, the splitting is a manifestation of the energy gap between neighboring bands that opens on the boundary of the Brillouin zone.
arXiv comment5 pages, 5 figures
References in corpus (14)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Josephson Junction Arrays with Bose-Einstein Condensates
- Bragg spectroscopy of a Bose-Einstein condensate
- Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1-D optical lattices
- Excitation of phonons in a Bose-Einstein condensate by light scattering
- A Bose-Einstein condensate in an optical lattice
- The Excitation Spectrum of a Bose-Einstein Condensate
- Dynamic structure factor and momentum distribution of a trapped Bose gas
- Bose-Einstein condensates in 1D optical lattices: compressibility, Bloch bands and elementary excitations
- Beliaev damping of quasi-particles in a Bose-Einstein condensate
- Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging
- Meanfield treatment of Bragg scattering from a Bose-Einstein condensate
- Non-adiabatic loading of a Bose-Einstein condensate into the ground state of an optical lattice
- Decoherence and dephasing in strongly driven colliding Bose-Einstein condensates