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Related Experiment Video

Updated: Mar 5, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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Efimov physics: a review.

Pascal Naidon1, Shimpei Endo

  • 1RIKEN Nishina Centre, RIKEN, Wako, 351-0198, Japan.

Reports on Progress in Physics. Physical Society (Great Britain)
|March 29, 2017
PubMed
Summary

Efimov physics describes quantum phenomena from short-range interactions, revealing a universal three-body attraction. This effect, observed in cold atoms and molecular beams, has implications for nuclear binding and halo nuclei.

Area of Science:

  • Quantum physics
  • Few-body physics
  • Many-body physics

Background:

  • Efimov physics is based on a scale-invariant three-body attraction, theoretically discovered by Vitaly Efimov in 1970.
  • This effect was proposed to explain nuclear binding (triton, Hoyle state of carbon-12) and halo nuclei.
  • Efimov's three-body effect has been experimentally evidenced in ultra-cold atomic clouds and molecular beams.

Purpose of the Study:

  • To review theoretical and experimental advances in Efimov physics.
  • To discuss the implications of the three-body parameter scaling with interaction range.
  • To explore the few- and many-body consequences of Efimov attraction.

Main Methods:

  • Theoretical review of quantum few-body and many-body phenomena.

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  • Experimental evidence from trapped ultra-cold atomic clouds.
  • Experimental evidence from diffracted molecular beams of gaseous helium.

    • Main Results:

    • The three-body parameter in Efimov theory scales with the range of atomic interactions.
    • Experimental observations confirmed the existence of Efimov states in atomic and molecular systems.
    • Theoretical investigations have explored broader consequences of Efimov attraction.

    Conclusions:

    • Efimov physics provides a framework for understanding resonant few-body and many-body phenomena.
    • Experimental evidence validates the existence and characteristics of Efimov states.
    • Efimov attraction is expected to be observed in a wider range of physical systems.