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Evidence for Ground- and Excited-State Efimov Trimers in a Three-State Fermi Gas
Quantum Physics · Submitted 6 Aug 2009
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We observe enhanced three-body recombination in an ultracold three-component $^6$Li Fermi gas with large but unequal scattering lengths attributable to an excited Efimov trimer state near the three-atom scattering threshold.
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The abstract, sentence by sentence
We observe enhanced three-body recombination in an ultracold three-component $^6$Li Fermi gas with large but unequal scattering lengths attributable to an excited Efimov trimer state near the three-atom scattering threshold. We find excellent agreement between the measured three-body recombination rate and the recombination rate calculated in the zero-range approximation where the only free parameters are the Efimov parameters $\kappa_*$ and $\eta_*$. The value of $\kappa_*$ determined by the location of the Efimov resonance we observe at 895 G also predicts the locations of loss features previously observed near 130 and 500 G \cite{Jochim08,OHara09} suggesting that all three features are associated with universal Efimov trimer states. We also report on the first realization of a quantum degenerate three-state Fermi gas with approximate SU(3) symmetry.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We observe enhanced three-body recombination in an ultracold three-component $^6$Li Fermi gas with large but unequal scattering lengths attributable to an excited Efimov trimer state near the three-atom scattering threshold. | result 0.97 | 0.96 | 0.79 | asserted 0.98 |
| s1 | We find excellent agreement between the measured three-body recombination rate and the recombination rate calculated in the zero-range approximation where the only free parameters are the Efimov parameters $\kappa_*$ and $\eta_*$. | result 0.95 | 0.96 | 0.12 | asserted 1.00 |
| s2 | The value of $\kappa_*$ determined by the location of the Efimov resonance we observe at 895 G also predicts the locations of loss features previously observed near 130 and 500 G \cite{Jochim08,OHara09} suggesting that all three features are associated with universal Efimov trimer states. | interpretation 0.86 | 0.80 | 0.23 | hedged possibility 0.91 |
| s3 | We also report on the first realization of a quantum degenerate three-state Fermi gas with approximate SU(3) symmetry. | contribution 0.85 | 0.95 | 0.07 | asserted 1.00 |
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The paper
Original abstract
We observe enhanced three-body recombination in an ultracold three-component $^6$Li Fermi gas with large but unequal scattering lengths attributable to an excited Efimov trimer state near the three-atom scattering threshold. We find excellent agreement between the measured three-body recombination rate and the recombination rate calculated in the zero-range approximation where the only free parameters are the Efimov parameters $\kappa_*$ and $\eta_*$. The value of $\kappa_*$ determined by the location of the Efimov resonance we observe at 895 G also predicts the locations of loss features previously observed near 130 and 500 G \cite{Jochim08,OHara09} suggesting that all three features are associated with universal Efimov trimer states. We also report on the first realization of a quantum degenerate three-state Fermi gas with approximate SU(3) symmetry.
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How the literature uses it
3 arXiv papers cite this in 9 sentences
Papers citing it · 5 sentences without a confident label
Uses its data or values 1 paper
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Using the values of $κ_*$ and $η_*$ determined by O'Hara et al. [ref] , we can calculate the universal predictions for other aspects of Efimov physics for $^6$Li atoms in the high-field universal region.
Efimov Physics in 6Li Atoms · Measurements of Three-body Recombination · 0.98
Cites it as background 2 papers
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A narrow 3-atom loss resonance in the high-field region near 895 G was recently discovered by Williams et al. [ref] and by Jochim and coworkers [ref] .
Efimov Physics in 6Li Atoms · Measurements of Three-body Recombination · 0.82
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The findings of Kraemer et al. stimulated extensive activity in the field of three-body physics, both experimentally [ref] and theoretically; for recent reviews on also the latter see [ref] and references therein.
Renormalization group study of the four-body problem · Introduction · 0.98
What it cites · 11 sentences without a confident label
Cites as background 4 papers
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Recently, Braaten and co-workers calculated the three-body recombination rate constant in the zero-range approximation for three fermions in distinguishable spin states at threshold [ref] .
Three-body Recombination of Lithium-6 Atoms with Large Negative Scattering Lengths · Introduction · 0.90
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This gives rise to an Efimov spectrum with a rich structure which is only now becoming understood theoretically [ref] .
Ultracold three-body collisions near overlapping Feshbach resonances · Introduction · 0.80
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The Efimov effect in bosonic systems near an isolated Feshbach resonance is now becoming well understood following the observation of atom-dimer resonances [ref] , Efimov resonances between bosons with different masses [ref] and tests of universal log-periodic scaling [ref] .
Observation of universality in ultracold 7Li three-body recombination · Introduction · 0.91
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