4.6 Article

Complete Bose-Einstein Condensation in the Gross-Pitaevskii Regime

Journal

COMMUNICATIONS IN MATHEMATICAL PHYSICS
Volume 359, Issue 3, Pages 975-1026

Publisher

SPRINGER
DOI: 10.1007/s00220-017-3016-5

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Funding

  1. NCCR SwissMAP
  2. Swiss National Foundation of Science through the SNF Grants Effective equations from quantum dynamics
  3. Swiss National Foundation of Science through Dynamical and energetic properties of Bose-Einstein condensates

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We consider a gas of N bosons in a box with volume one interacting through a two-body potential with scattering length of order (Gross-Pitaevskii limit). Assuming the (unscaled) potential to be sufficiently weak, we prove complete Bose-Einstein condensation for the ground state and for many-body states with finite excitation energy in the limit of large N with a uniform (N-independent) bound on the number of excitations.

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