Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-04-07
Phys. Rev. Lett. 106, 129601 (2011)
Physics
Condensed Matter
Quantum Gases
Scientific paper
In a recent Letter (Phys. Rev. lett. 105, 195301 (2010)), Song et al. introduced a new variational approach to treat strong attractive boson-fermion (BF) correlations in BF atomic mixtures. The proposed theory predicts a first order phase transition to a condensate of composite BF pairs with center of mass momentum Q=0 as opposed to a composite fermionic molecular Fermi gas. We show in this comment that their approach is incorrect and moreover, by resorting to an exactly solvable model we demonstrate that there cannot be more than one correlated Q=0 BF pair in complete contradiction with their conclusions.
Dukelsky Jorge
Esebbag C.
Schuck Peter
Suzuki Toshiya
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