High sensitivity phonon spectroscopy of Bose-Einstein condensates using matter-wave interference
arXiv:cond-mat/0405222 · doi:10.1103/PhysRevLett.93.220403
Abstract
We study low momentum excitations of a Bose-Einstein condensate using a novel matter-wave interference technique. In time-of-flight expansion images we observe strong matter-wave fringe patterns. The fringe contrast is a sensitive spectroscopic probe of in-trap phonons and is explained by use of a Bogoliubov excitation projection method applied to the rescaled order parameter of the expanding condensate. Gross-Pitaevskii simulations agree with the experimental data and confirm the validity of the theoretical interpretation. We show that the high sensitivity of this detection scheme gives access to the quantized quasiparticle regime.
5 pages, 5 figures, author list updated
References in corpus (11)
- Bragg spectroscopy of a Bose-Einstein condensate
- Excitation of phonons in a Bose-Einstein condensate by light scattering
- Evolution of a Bose-condensed gas under variations of the confining potential
- A Bose-Einstein condensate in an optical lattice
- The Excitation Spectrum of a Bose-Einstein Condensate
- Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering
- Bragg spectroscopy of the multi-branch Bogoliubov spectrum of elongated Bose-Einstein condensates
- Theory of coherent Bragg spectroscopy of a trapped Bose-Einstein condensate
- Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging
- Bogoliubov spectrum and Bragg spectroscopy of elongated Bose-Einstein condensates
- The fate of phonons in freely expanding Bose-Einstein condensates
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