2002/09/30 by Paulo F. Bedaque, Aurel Bulgac, Gautam Rupak
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.stat-mech #nucl-th #physics.atom-ph
paper · pdf · doi:10.1103/physreva.68.033606
published as Phys.Rev. A68 (2003) 033606 · final published version, typos corrected, updated references and added one reference
openalex publication_date 2003/09/19 · arxiv created 2003/10/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It was recently shown [A. Bulgac, Phys. Rev. Lett. 89, 050402 (2002)] that an entirely new class of quantum liquids with widely tunable properties could be manufactured from bosons, fermions, and their mixtures by controlling their interaction properties by means of a Feshbach resonance. Since the quantum fluctuations in this regime could, in principle, destabilize these objects, we extend the previous mean-field analysis of these quantum liquids by computing the lowest-order quantum corrections to the ground-state energy and the depletion of the Bose-Einstein condensate and by estimating the higher-order corrections as well. We show that the quantum corrections are relatively small, do not lead to the destabilization of the droplets and are controlled by the diluteness parameter √n|a|3\ensuremath≪1, even though strictly speaking in this case there is no low density expansion.