A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Feshbach-resonant interactions in K-40 and Li-6 degenerate Fermi gases
Tekijät: Mackie M, Piilo J
Kustantaja: AMERICAN PHYSICAL SOC
Julkaisuvuosi: 2005
Journal: Physical Review Letters
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW LETTERS
Lehden akronyymi: PHYS REV LETT
Artikkelin numero: ARTN 060403
Vuosikerta: 94
Numero: 6
Sivujen määrä: 4
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.94.060403
Tiivistelmä
We theoretically examine a system of Fermi degenerate atoms coupled to bosonic molecules by a Feshbach resonance, focusing on the superfluid transition to a molecular Bose-Einstein condensate dressed by Cooper pairs of atoms. This problem raises interest because it is unclear at present whether bimodal density distributions observed recently in K-40 and Li-6 are due to a condensate of bosonic molecules or fermionic atom pairs. As opposed to K-40, we find that any measurable fraction of above-threshold bosonic molecules is necessarily absent for the Li-6 system in question, which strongly implicates Cooper pairs as the culprit behind its bimodal distributions.
We theoretically examine a system of Fermi degenerate atoms coupled to bosonic molecules by a Feshbach resonance, focusing on the superfluid transition to a molecular Bose-Einstein condensate dressed by Cooper pairs of atoms. This problem raises interest because it is unclear at present whether bimodal density distributions observed recently in K-40 and Li-6 are due to a condensate of bosonic molecules or fermionic atom pairs. As opposed to K-40, we find that any measurable fraction of above-threshold bosonic molecules is necessarily absent for the Li-6 system in question, which strongly implicates Cooper pairs as the culprit behind its bimodal distributions.
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