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Observation of Resonance Condensation of Fermionic Atom Pairs
Open accessAbstract
We have observed condensation of fermionic atom pairs in the BCS-BEC crossover regime. A trapped gas of fermionic 40K atoms is evaporatively cooled to quantum degeneracy and then a magnetic-field Feshbach resonance is used to control the atom-atom interactions. The location of this resonance is precisely determined from low-density measurements of molecule dissociation. In order to search for condensation on either side of the resonance, we introduce a technique that pairwise projects fermionic atoms onto molecules; this enables us to measure the momentum distribution of fermionic atom pairs. The transition to condensation of fermionic atom pairs is mapped out as a function of the initial atom gas temperature T compared to the Fermi temperature T(F) for magnetic-field detunings on both the BCS and BEC sides of the resonance.
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Citations
Cited by
Many-body physics with ultracold gases
Bloch, I., Dalibard, J., & Zwerger, W. (2008) · Reviews of Modern Physics · doi:10.1103/revmodphys.80.885 · Cited by 8,114
Georgescu, I. M., Ashhab, S., & Nori, F. (2014) · Reviews of Modern Physics · doi:10.1103/revmodphys.86.153 · Cited by 2,932
“By tuning interatomic interactions using Feshbach resonances, it was possible to investigate the crossover from a Bardeen-Cooper-Schrieffer (BCS) state of weakly attractive fermions to a Bose-Einstein condensate (BEC) of tightly bound fermion pairs (Regal et al., 2004; Zwierlein et al., 2005).”
BackgroundMethodUltracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
Lewenstein, M., Sanpera, A., Ahufinger, V., Damski, B., Sen(De), A., & Sen, U. (2007) · Advances in Physics · doi:10.1080/00018730701223200 · Cited by 2,104
Dicke quantum phase transition with a superfluid gas in an optical cavity
Baumann, K., Guerlin, C., Brennecke, F., & Esslinger, T. (2010) · Nature · doi:10.1038/nature09009 · Cited by 1,530
Ultracold quantum gases in optical lattices
Bloch, I. (2005) · Nature Physics · doi:10.1038/nphys138 · Cited by 1,457
Metadata
- Authors
- Regal, C. A., Greiner, M., & Jin, D. S.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2004-01-28
- Volume
- 92
- Issue
- 4
- Pages
- 040403-040403
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2000530877
- Cited by
- 1,684
- References
- 0
- FWCI
- 118.97
- Type
- journal article
- Language
- en
- Open access
- green
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- Regal, C. A., Greiner, M., & Jin, D. S. (2004). Observation of Resonance Condensation of Fermionic Atom Pairs. Physical Review Letters. https://doi.org/10.1103/physrevlett.92.040403
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