Quantum degenerate Bose-Fermi mixture of chemically different atomic species with widely tunable interactions
We have created a quantum degenerate Bose-Fermi mixture of [superscript 23]Na and [superscript 40]K with widely tunable interactions via broad interspecies Feshbach resonances. Over 30 Feshbach resonances between [superscript 23]Na and [superscript 40]K were identified, including p-wave multiplet re...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71722 https://orcid.org/0000-0003-4329-5163 https://orcid.org/0000-0001-8120-8548 https://orcid.org/0000-0003-2672-5264 |
| Summary: | We have created a quantum degenerate Bose-Fermi mixture of [superscript 23]Na and [superscript 40]K with widely tunable interactions via broad interspecies Feshbach resonances. Over 30 Feshbach resonances between [superscript 23]Na and [superscript 40]K were identified, including p-wave multiplet resonances. The large and negative triplet background scattering length between [superscript 23]Na and [superscript 40]K causes a sharp enhancement of the fermion density in the presence of a Bose condensate. As explained via the asymptotic bound-state model, this strong background scattering leads to wide Feshbach resonances observed at low magnetic fields. Our work opens up the prospect to create chemically stable, fermionic ground-state molecules of [superscript 23]Na-[superscript 40]K, where strong, long-range dipolar interactions would set the dominant energy scale. |
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