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Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms

We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes. Our system consists of open-shell alkali-metal (6)Li and closed-shell (173)Yb atoms, both spin...

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Autores principales: Green, Alaina, Li, Hui, Toh, Jun Hui See, Tang, Xinxin, McCormick, Katherine C., Li, Ming, Tiesinga, Eite, Kotochigova, Svetlana, Gupta, Subhadeep
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8369980/
https://www.ncbi.nlm.nih.gov/pubmed/34408918
http://dx.doi.org/10.1103/PhysRevX.10.031037
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author Green, Alaina
Li, Hui
Toh, Jun Hui See
Tang, Xinxin
McCormick, Katherine C.
Li, Ming
Tiesinga, Eite
Kotochigova, Svetlana
Gupta, Subhadeep
author_facet Green, Alaina
Li, Hui
Toh, Jun Hui See
Tang, Xinxin
McCormick, Katherine C.
Li, Ming
Tiesinga, Eite
Kotochigova, Svetlana
Gupta, Subhadeep
author_sort Green, Alaina
collection PubMed
description We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes. Our system consists of open-shell alkali-metal (6)Li and closed-shell (173)Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK. We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of (6)Li and the nuclear spin of (173)Yb. Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature. Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum. The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures.
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spelling pubmed-83699802021-08-17 Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms Green, Alaina Li, Hui Toh, Jun Hui See Tang, Xinxin McCormick, Katherine C. Li, Ming Tiesinga, Eite Kotochigova, Svetlana Gupta, Subhadeep Phys Rev X Article We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes. Our system consists of open-shell alkali-metal (6)Li and closed-shell (173)Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK. We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of (6)Li and the nuclear spin of (173)Yb. Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature. Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum. The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures. 2020 /pmc/articles/PMC8369980/ /pubmed/34408918 http://dx.doi.org/10.1103/PhysRevX.10.031037 Text en https://creativecommons.org/licenses/by/4.0/Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/)
spellingShingle Article
Green, Alaina
Li, Hui
Toh, Jun Hui See
Tang, Xinxin
McCormick, Katherine C.
Li, Ming
Tiesinga, Eite
Kotochigova, Svetlana
Gupta, Subhadeep
Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title_full Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title_fullStr Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title_full_unstemmed Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title_short Feshbach Resonances in p-Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell (6)Li and Closed-Shell (173)Yb Atoms
title_sort feshbach resonances in p-wave three-body recombination within fermi-fermi mixtures of open-shell (6)li and closed-shell (173)yb atoms
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8369980/
https://www.ncbi.nlm.nih.gov/pubmed/34408918
http://dx.doi.org/10.1103/PhysRevX.10.031037
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