| Issue |
Europhys. Lett.
Volume 75, Number 5, September 2006
|
|
|---|---|---|
| Page(s) | 695 - 701 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2006-10165-x | |
| Published online | 21 July 2006 | |
Molecular signatures in the structure factor of an interacting Fermi gas
1
Laboratoire de Physique Statistique, Ecole Normale Supérieure 24 rue Lhomond, 75231 Paris Cedex 05, France
2
Dipartimento di Fisica, Università di Trento and CNR-INFM BEC Center I-38050 Povo, Trento, Italy
Received:
19
May
2006
Accepted:
4
July
2006
The static and dynamic structure factors of an interacting Fermi gas
along the BCS-BEC crossover are calculated at momentum transfer
higher than the Fermi momentum. The spin structure
factor is found to be very sensitive to the correlations associated
with the formation of molecules. On the BEC side of the crossover,
even close to unitarity, clear evidence is found for a molecular
excitation at 
, where m is the atomic mass. Both
quantum Monte Carlo and dynamic mean-field results are presented.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties / 03.75.Ss – Degenerate Fermi gases / 05.30.Fk – Fermion systems and electron gas
© EDP Sciences, 2006
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