Bulletin of the American Physical Society

An effective field theory analysis of Efimov features in heteronuclear mixture of ultracold atomic gases

Bijaya Acharya, Chen Ji, Lucas Platter

Published May 25, 2016• 0 citations

OpenAlex

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An Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of $$^\textbf{6}$$Li and $$^\textbf{133}$$Cs Atoms

Eleonora Lippi, Manuel Gerken, Stephan Häfner +10 more

Abstract We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of $$^6$$ 6 Li- $$^{133}$$ 133 Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of $${1\times 10^{4}}$$ 1 × 10 4 Cs atoms and $${7\times 10^{3}}$$ 7 × 10 3 Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.

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Bulletin of the American Physical Society

An effective field theory analysis of Efimov features in heteronuclear mixture of ultracold atomic gases

Bijaya Acharya, Chen Ji, Lucas Platter

Published May 25, 2016• 0 citations

OpenAlex

Related papers

Heteronuclear Efimov Scenario in Ultracold Quantum Gases

Juris Ulmanis

Springer thesesJan 1, 20170 citations

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Lucas Platter

Springer proceedings in physicsJan 1, 20200 citations

Effective-field-theory analysis of Efimov physics in heteronuclear mixtures of ultracold atomic gases

Bijaya Acharya, Chen Ji, Lucas Platter

We use an effective-field-theory framework to analyze the Efimov effect in heteronuclear three-body systems consisting of two species of atoms with a large interspecies scattering length. In the leading-order description of this theory, various three-body observables in heteronuclear mixtures can be universally parametrized by one three-body parameter. We present the next-to-leading corrections, which include the effects of the finite interspecies effective range and the finite intraspecies scattering length, to various three-body observables. We show that only one additional three-body parameter is required to render the theory predictive at this order. By including the effective range and intraspecies scattering length corrections, we derive a set of universal relations that connect the different Efimov features near the interspecies Feshbach resonance. Furthermore, we show that these relations can be interpreted in terms of the running of the three-body counterterms that naturally emerge from proper renormalization. Finally, we make predictions for recombination observables of a number of atomic systems that are of experimental interest.We use an effective-field-theory framework to analyze the Efimov effect in heteronuclear three-body systems consisting of two species of atoms with a large interspecies scattering length. In the leading-order description of this theory, various three-body observables in heteronuclear mixtures can be universally parametrized by one three-body parameter. We present the next-to-leading corrections, which include the effects of the finite interspecies effective range and the finite intraspecies scattering length, to various three-body observables. We show that only one additional three-body parameter is required to render the theory predictive at this order. By including the effective range and intraspecies scattering length corrections, we derive a set of universal relations that connect the different Efimov features near the interspecies Feshbach resonance. Furthermore, we show that these relations can be interpreted in terms of the running of the three-body counterterms that naturally emerge from proper renormalization. Finally, we make predictions for recombination observables of a number of atomic systems that are of experimental interest.

arXiv:1606.04508Physical Review ASep 6, 201613 citations

An Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of $^\textbf{6}$ Li and $^\textbf{133}$ Cs AtomsAn Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of $$^\textbf{6}$$Li and $$^\textbf{133}$$Cs Atoms

Eleonora Lippi, Manuel Gerken, Stephan Häfner +10 more

Abstract We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of $^6$ 6 Li- $^{133}$ 133 Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of ${1\times 10^{4}}$ 1 × 10 4 Cs atoms and ${7\times 10^{3}}$ 7 × 10 3 Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.Abstract We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of $$^6$$ 6 Li- $$^{133}$$ 133 Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of $${1\times 10^{4}}$$ 1 × 10 4 Cs atoms and $${7\times 10^{3}}$$ 7 × 10 3 Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.

arXiv:2410.16031Few-Body SystemsNov 29, 20244 citations

Signatures of Efimov's effect in ultracold gases

Thorsten Köhler, Mark Lee, Paul S. Julienne

Bulletin of the American Physical SocietyJun 7, 20070 citations

The heteronuclear Eﬁmov effect

K. Helfrich, H.‐W. Hammer

Ultracold quantum gases with large scattering length show resonant enhancement of three-body loss rates when an Eﬁmov trimer is at the scattering threshold. We calculate the three-body loss rates in heteronuclear mixtures of atoms for the case of large scattering length between the unlike atoms. Using zero-range interactions, we present results from the numerical solution of the integral equations for the recombination amplitude in momentum space and extract expressions for the recombination rate constants. Moreover, we calculate the relative positions of loss features for diﬀerent sign of the scattering length and a ﬁrst comparison with available experimental data is shown.Ultracold quantum gases with large scattering length show resonant enhancement of three-body loss rates when an Eﬁmov trimer is at the scattering threshold. We calculate the three-body loss rates in heteronuclear mixtures of atoms for the case of large scattering length between the unlike atoms. Using zero-range interactions, we present results from the numerical solution of the integral equations for the recombination amplitude in momentum space and extract expressions for the recombination rate constants. Moreover, we calculate the relative positions of loss features for diﬀerent sign of the scattering length and a ﬁrst comparison with available experimental data is shown.

EPJ Web of ConferencesJan 1, 20103 citations

An Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of

^\textbf{6}

Li and

^\textbf{133}

Cs Atoms

Abstract We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of

^6

6 Li-

^{133}

133 Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of

{1\times 10^{4}}

1 × 10 4 Cs atoms and

{7\times 10^{3}}

7 × 10 3 Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.