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The interaction of short and strong laser pulses with an atomic Bose-Einstein condensate is found to generate patterns of recoiling atoms that are different from those seen in previous light-scattering experiments. This phenomenon can only be explained by optical stimulation, showing that the previous description of superradiance as atomic stimulation is(More)
We demonstrate a Raman amplifier for matter waves, where the amplified atoms and the gain medium are in two different hyperfine states. This amplifier is based on a form of superradiance that arises from self-stimulated Raman scattering in a Bose-Einstein condensate. With the realization of coherent, laserlike atoms in the form of Bose-Einstein condensates(More)
  • Aaron E Leanhardt, David E Pritchard, Cecil, Ida Green, Thomas J Greytak, Todd Gustavson +18 others
  • 2003
Gaseous Bose-Einstein condensates containing up to 3 × 10 6 23 Na atoms were loaded into magnetic microtraps and waveguides on a microfabricated " atom chip " using optical tweezers. Single-mode propagation was observed along the waveguide. Closer to the microfabricated surface, perturbations to the waveguide potential spatially modulated the condensate(More)
We describe a versatile and simple scheme for producing magnetically and optically-trapped 87 Rb Bose-Einstein condensates, based on a moving-coil transporter apparatus. The apparatus features a TOP trap that incorporates the movable quadrupole coils used for magneto-optical trapping and long-distance magnetic transport of atomic clouds. As a stand-alone(More)
This thesis discusses a series of studies that investigate the effects of interaction – essentially the s-wave scattering – in the various properties of Bose-Einstein conden-sates (BEC). The phonon wavefunction in a BEC was measured using Bragg spectroscopy and compared with the well-known Bogoliubov theory. Phonons were first excited in a BEC of 3 × 10 7(More)
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