Role of the intraspecies scattering length in the Efimov scenario with large mass difference

Role of the intraspecies scattering length in the Efimov scenario with large mass difference We experimentally and theoretically study the effect of the intraspecies scattering length onto the heteronuclear Efimov scenario, following up on our earlier observation of Efimov resonances in an ultracold Cs-Li mixture for negative [Pires , Phys. Rev. Lett. 112, 250404 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.250404] and positive Cs-Cs scattering length [Ulmanis , Phys. Rev. Lett. 117, 153201 (2016)PRLTAO0031-900710.1103/PhysRevLett.117.153201]. Three theoretical models of increasing complexity are employed to quantify its influence on the scaling factor and the three-body parameter: a simple Born-Oppenheimer picture, a zero-range theory, and a spinless van der Waals model. These models are compared to Efimov resonances observed in an ultracold mixture of bosonic Cs133 and fermionic Li6 atoms close to two Cs-Li Feshbach resonances located at 843 G and 889 G, characterized by different sign and magnitude of the Cs-Cs interaction. By changing the sign and magnitude of the intraspecies scattering length different scaling behaviors of the three-body loss rate are identified, in qualitative agreement with theoretical predictions. The three-body loss rate is strongly influenced by the intraspecies scattering length. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

Role of the intraspecies scattering length in the Efimov scenario with large mass difference

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Role of the intraspecies scattering length in the Efimov scenario with large mass difference

Abstract

We experimentally and theoretically study the effect of the intraspecies scattering length onto the heteronuclear Efimov scenario, following up on our earlier observation of Efimov resonances in an ultracold Cs-Li mixture for negative [Pires , Phys. Rev. Lett. 112, 250404 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.250404] and positive Cs-Cs scattering length [Ulmanis , Phys. Rev. Lett. 117, 153201 (2016)PRLTAO0031-900710.1103/PhysRevLett.117.153201]. Three theoretical models of increasing complexity are employed to quantify its influence on the scaling factor and the three-body parameter: a simple Born-Oppenheimer picture, a zero-range theory, and a spinless van der Waals model. These models are compared to Efimov resonances observed in an ultracold mixture of bosonic Cs133 and fermionic Li6 atoms close to two Cs-Li Feshbach resonances located at 843 G and 889 G, characterized by different sign and magnitude of the Cs-Cs interaction. By changing the sign and magnitude of the intraspecies scattering length different scaling behaviors of the three-body loss rate are identified, in qualitative agreement with theoretical predictions. The three-body loss rate is strongly influenced by the intraspecies scattering length.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1050-2947
eISSN
1094-1622
D.O.I.
10.1103/PhysRevA.95.062708
Publisher site
See Article on Publisher Site

Abstract

We experimentally and theoretically study the effect of the intraspecies scattering length onto the heteronuclear Efimov scenario, following up on our earlier observation of Efimov resonances in an ultracold Cs-Li mixture for negative [Pires , Phys. Rev. Lett. 112, 250404 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.250404] and positive Cs-Cs scattering length [Ulmanis , Phys. Rev. Lett. 117, 153201 (2016)PRLTAO0031-900710.1103/PhysRevLett.117.153201]. Three theoretical models of increasing complexity are employed to quantify its influence on the scaling factor and the three-body parameter: a simple Born-Oppenheimer picture, a zero-range theory, and a spinless van der Waals model. These models are compared to Efimov resonances observed in an ultracold mixture of bosonic Cs133 and fermionic Li6 atoms close to two Cs-Li Feshbach resonances located at 843 G and 889 G, characterized by different sign and magnitude of the Cs-Cs interaction. By changing the sign and magnitude of the intraspecies scattering length different scaling behaviors of the three-body loss rate are identified, in qualitative agreement with theoretical predictions. The three-body loss rate is strongly influenced by the intraspecies scattering length.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Jun 29, 2017

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