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Creators/Authors contains: "Jaschke, Daniel"

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  1. ; ; (, Physical Review B)
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  2. ; ; (, Quantum Science and Technology)
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  3. ; ; (, Quantum Science and Technology)
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  4. ; ; (, Scientific Reports)
    Abstract We explore the quantum many-body physics of a three-component Bose-Einstein condensate in an optical lattice driven by laser fields inVand Λ configurations. We obtain exact analytical expressions for the energy spectrum and amplitudes of elementary excitations, and discover symmetries among them. We demonstrate that the applied laser fields induce a gap in the otherwise gapless Bogoliubov spectrum. We find that Landau damping of the collective modes above the energy of the gap is carried by laser-induced roton modes and is considerably suppressed compared to the phonon-mediated damping endemic to undriven scalar condensates 
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  5. ; ; (, Physical Review A)
  6. ; ; (, Computer Physics Communications)
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  7. ; ; ; (, Physical Review Letters)