Work

Observation of Resonance Condensation of Fermionic Atom Pairs

Year: 2004

Type: article

Abstract: 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.92.040403

Authors: C. A. Regal, M. Greiner, D. S. Jin

Institutions: National Institute of Standards and Technology, Joint Institute for Laboratory Astrophysics, University of Colorado Boulder

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, National Institute of Standards and Technology

OpenAlex ID: W2000530877

FWCI: 104.2

Cites: 35

Cited by: 1,692

Related to: 10