The nature of superfluidity in ultracold gases near Feshbach resonances

Journal Article · Thu May 05 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1928858· OSTI ID:20718879

Holland, M J ^[1]; Menotti, C; Viverit, L ^[2]

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1. JILA, 440 UCB, University of Colorado, Boulder, CO 80309-0440 (United States)
2. CRS-BEC INFM, Universita di Trento, via Sommarive 14, I-38050 Povo (Italy)

We formulate a many-body theory of a dilute quantum gas focusing specifically on the description of a scattering resonance. This situation is relevant to current experiments in atomic physics involving Feshbach resonances. In a Feshbach resonance a continuum scattering channel is degenerately coupled to an isolated bound state. The presence of such a resonance allows the interaction properties between atoms to be varied by modifying the strength of an external magnetic field. Since the interactions can be made strong this creates the possibility for entering parameter regimes in which simple perturbative theories of the gas fail.

• OSTI ID: 20718879
• Journal Information: AIP Conference Proceedings, Vol. 770, Issue 1; Conference: ICAP 2004: 19. international conference on atomic physics, Rio de Janeiro (Brazil), 25-30 Jul 2004; Other Information: DOI: 10.1063/1.1928858; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
BOUND STATE
GASES
INTERACTIONS
MAGNETIC FIELDS
MANY-BODY PROBLEM
RESONANCE
SCATTERING
SUPERFLUIDITY