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Fermions meet two bosons: the Heteronuclear Efimov effect revisited

In this article, we revisit the heteronuclear Efimov effect in a Bose-Fermi mixture with large mass difference in the Born-Oppenheimer picture. As a specific example, we consider the combination of bosonic 133Cs and fermionic 6Li. In a system consisting of two heavy bosons and one light fermion, the...

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Main Authors: Tran, Binh (Author) , Rautenberg, Michael (Author) , Gerken, Manuel (Author) , Lippi, Eleonora (Author) , Zhu, Bing (Author) , Ulmanis, Juris (Author) , Drescher, Moritz (Author) , Salmhofer, Manfred (Author) , Enss, Tilman (Author) , Weidemüller, Matthias (Author)
Format: Article (Journal)
Language:English
Published: 2021
In: Brazilian journal of physics
Year: 2021, Volume: 51, Issue: 2, Pages: 316-322
ISSN:1678-4448
DOI:10.1007/s13538-020-00811-5
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s13538-020-00811-5
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Author Notes:Binh Tran, Michael Rautenberg, Manuel Gerken, Eleonora Lippi, Bing Zhu, Juris Ulmanis, Moritz Drescher, Manfred Salmhofer, Tilman Enss, Matthias Weidemüller
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Summary:In this article, we revisit the heteronuclear Efimov effect in a Bose-Fermi mixture with large mass difference in the Born-Oppenheimer picture. As a specific example, we consider the combination of bosonic 133Cs and fermionic 6Li. In a system consisting of two heavy bosons and one light fermion, the fermion-mediated potential between the two heavy bosons gives rise to an infinite series of three-body bound states. The intraspecies scattering length determines the three-body parameter and the scaling factor between consecutive Efimov states. In a second scenario, we replace the single fermion by an entire Fermi Sea at zero temperature. The emerging interaction potential for the two bosons exhibits long-range oscillations leading to a weakening of the binding and a breakup of the infinite series of Efimov states. In this scenario, the binding energies follow a modified Efimov scaling law incorporating the Fermi momentum. The scaling factor between deeply bound states is governed by the intraspecies interaction, analogous to the Efimov states in vacuum.
Item Description:Published: 09 November 2020
Gesehen am 14.10.2021
Physical Description:Online Resource
ISSN:1678-4448
DOI:10.1007/s13538-020-00811-5

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