A quantum-mechanical description is presented for the three-body physics of shielded dipolar molecules, including a prediction of observable Efimov physics. Despite the anisotropic and long-range nature of the interaction, shielding enables a regime in which universality emerges already at the two-body level and extends to the three-body sector, where Efimov physics emerges. On the negative side of the scattering-length resonance, computed trimer binding energies display the characteristic scaling expected for Efimov resonances. Finally, the sudden approximation can be used to create trimer bound states, starting from positive energy trap states as a way to create or detect these molecular trimers. Moreover, the three-body parameter expressed in dipolar units is found to be universal.A quantum-mechanical description is presented for the three-body physics of shielded dipolar molecules, including a prediction of observable Efimov physics. Despite the anisotropic and long-range nature of the interaction, shielding enables a regime in which universality emerges already at the two-body level and extends to the three-body sector, where Efimov physics emerges. On the negative side of the scattering-length resonance, computed trimer binding energies display the characteristic scaling expected for Efimov resonances. Finally, the sudden approximation can be used to create trimer bound states, starting from positive energy trap states as a way to create or detect these molecular trimers. Moreover, the three-body parameter expressed in dipolar units is found to be universal.

physics.atom-phCross-listedarXiv:2602.21433Physical Review LettersFeb 26, 20260 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

Triatomic continuum resonances for large negative scattering lengths

Francis G. Bringas, Marcelo Takeshi Yamashita, T. Frederico

We study triatomic systems in the regime of large negative scattering lengths which may be more favorable for the formation of condensed trimers in trapped ultracold monoatomic gases as the competition with the weakly bound dimers is absent. The manipulation of the scattering length can turn an excited weakly bound Efimov trimer into a continuum resonance. Its energy and width are described by universal scaling functions written in terms of the scattering length and the binding energy ${B}_{3}$ of the shallowest triatomic molecule. For ${a}^{\ensuremath{-}1}<\ensuremath{-}0.0297\sqrt{m{B}_{3}∕{\ensuremath{\hbar}}^{2}}$, the excited Efimov state turns into a continuum resonance.We study triatomic systems in the regime of large negative scattering lengths which may be more favorable for the formation of condensed trimers in trapped ultracold monoatomic gases as the competition with the weakly bound dimers is absent. The manipulation of the scattering length can turn an excited weakly bound Efimov trimer into a continuum resonance. Its energy and width are described by universal scaling functions written in terms of the scattering length and the binding energy ${B}_{3}$ of the shallowest triatomic molecule. For ${a}^{\ensuremath{-}1}<\ensuremath{-}0.0297\sqrt{m{B}_{3}∕{\ensuremath{\hbar}}^{2}}$, the excited Efimov state turns into a continuum resonance.

arXiv:cond-mat/0312291Physical Review AApr 15, 200449 citations

High-precision spectroscopy of ultracold molecules in an optical lattice

B. H. McGuyer, Mickey McDonald, G. Z. Iwata +4 more

The study of ultracold molecules tightly trapped in an optical lattice can expand the frontier of precision measurement and spectroscopy, and provide a deeper insight into molecular and fundamental physics. Here we create, probe, and image microkelvin 88 Sr 2 molecules in a lattice, and demonstrate precise measurements of molecular parameters as well as coherent control of molecular quantum states using optical fields. We discuss the sensitivity of the system to dimensional effects, a new bound-to-continuum spectroscopy technique for highly accurate binding energy measurements, and prospects for new physics with this rich experimental system.The study of ultracold molecules tightly trapped in an optical lattice can expand the frontier of precision measurement and spectroscopy, and provide a deeper insight into molecular and fundamental physics. Here we create, probe, and image microkelvin 88 Sr 2 molecules in a lattice, and demonstrate precise measurements of molecular parameters as well as coherent control of molecular quantum states using optical fields. We discuss the sensitivity of the system to dimensional effects, a new bound-to-continuum spectroscopy technique for highly accurate binding energy measurements, and prospects for new physics with this rich experimental system.

arXiv:1501.01236New Journal of PhysicsMay 6, 201534 citations

Efimov Resonances in Ultracold Quantum Gases

Francesca Ferlaino, Alessandro Zenesini, Martin Berninger +3 more

arXiv:1108.1909Few-Body SystemsOct 8, 2011140 citations

{B}_{3}

of the shallowest triatomic molecule. For ${a}^{\ensuremath{-}1}<\ensuremath{-}0.0297\sqrt{m{B}_{3}∕{\ensuremath{\hbar}}^{2}}$, the excited Efimov state turns into a continuum resonance.