Stable 85Rb bose-einstein condensates with widely tunable interactions

By S. Cornish, N. Claussen, J. L. Roberts, E. A. Cornell, Carl E. Wieman. Physical Review Letters, 2000

634 citations recorded by the source corpus.

Bose-Einstein condensation has been achieved in a magnetically trapped sample of 85Rb atoms. Long-lived condensates of up to 10(4) atoms have been produced by using a magnetic-field-induced Feshbach resonance to reverse the sign of the scattering length. This system provides new opportunities for the study of condensate physics. The variation of the scattering length near the resonance has been used to magnetically tune the condensate self-interaction energy over a wide range, extending from strong repulsive to large attractive interactions. When the interactions were switched from repulsive to attractive, the condensate shrank to below our resolution limit, and after approximately 5 ms emitted a burst of high-energy atoms.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/a6477d3c5d259e3dbdd198c885d14dd01831f1fd

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

• Analogue Models of and for Gravity (2001, background): “This effect can be used to increment the scattering length; factors of up to 100 have been experimentally obtained [19].”
• Periodic Solutions of a Singular Equation With Indefinite Weight (2010, background): “Experimentally, this effect can be obtained by the so-called Feshbach-resonance management [ 5 , 6]. Recently, a square-wave control like (1.2) has been explicitly considered in [19].”
• A Rigorous Derivation¶of the Gross–Pitaevskii Energy Functional¶for a Two-dimensional Bose Gas (2000, background): “The first alternative is usually simpler in practice but very recently a direct tuning of the scattering length itself has also been shown to be feasible [19].”
• Theory of the weakly interacting Bose gas (2003, background): “In recent experiments, Cornish et al. (Cornish et al., 2000) were able to vary the s-wave scattering length a for 85Rb atoms over a large range by applying a strong external magnetic field and exploiting the existence of a Feshbach resonance at B ∼ 155 G. Values for √ na3 up to approximately 0.1 wer”
• Making, probing and understanding ultracold Fermi gases (2008, background): “nsities required [9]. When Feshbach resonances were explored in bosonic systems, strong interactions were always accompanied by strong losses, preventing the study of strongly interacting condensates [7, 10, 11]. The reason is that a Feshbach resonance couples the atomic Hilbert space to a resonant ”
• Feshbach resonances in ultracold gases (2008, methodology): “The in-situ measurements were used to experimentally determine a(B) (Cornish et al., 2000).”