Corpus ID: 235670023

Beyond Gross-Pitaevskii equation for 1D gas: quasiparticles and solitons

  title={Beyond Gross-Pitaevskii equation for 1D gas: quasiparticles and solitons},
  author={Jakub Kopyci'nski and Maciej Lebek and Maciej Marciniak and Rafał Ołdziejewski and Wojciech G'orecki and Krzysztof Pawłowski},
Describing properties of a strongly interacting quantum many-body system poses a serious challenge both for theory and experiment. In this work, we study elementary excitations of one-dimensional repulsive Bose gas for arbitrary interaction strength using a hydrodynamic approach. We use linearization to study type-I excitations and numerical minimization to study type-II excitations. We observe a good agreement between our approach and exact solutions of the Lieb-Liniger model for the particle… Expand


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