Universal Trimers induced by Spin-Orbit Coupling in Ultracold Fermi Gases

Abstract

In this letter we address the issue how synthetic spin-orbit (SO) coupling can strongly affect three-body physics in ultracold atomic gases. We consider a system which consists of three fermionic atoms, including two spinless heavy atoms and one spin-1/2 light atom subjected to an isotropic SO coupling. We find that SO coupling can induce universal three-body bound states with negative s-wave scattering length at a smaller mass ratio, where no trimer bound state can exist if in the absence of SO coupling. The energies of these trimers are independent of high-energy cutoff, and therefore they are universal ones. Moreover, the resulting atom-dimer resonance can be effectively controlled by SO coupling strength. Our results can be applied to systems like ${}^6$Li and ${}^{40}$K mixture.

7 pages, 4 figures

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• Universal Borromean Binding in Spin-Orbit Coupled Ultracold Fermi Gases
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• General ultracold scattering formalism with isotropic spin orbit coupling
• Topological superradiant state in Fermi gases with cavity induced spin-orbit coupling
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• Universal description of three two-component fermions
• Scattering framework for two particles with isotropic spin-orbit coupling applicable to all energies
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• Quantum entropic self-localization with ultracold fermions
• Efimov physics and universal trimer in spin-orbit coupled ultracold atomic mixtures
• Few-body physics of ultracold atoms and molecules with long-range interactions
• Energy spectra of two interacting fermions with spin-orbit coupling in a harmonic trap
• Angular topological superfluid and topological vortex in an ultracold Fermi gas
• Universal relations for spin-orbit coupled Fermi gas near an s-wave resonance
• Three-component Fulde-Ferrell superfluids in a two-dimensional Fermi gas with spin-orbit coupling
• Quantum collision theory in flat bands
• Multichannel Molecular State and Rectified Short-range Boundary Condition for Spin-orbit Coupled Ultracold Fermions Near p-wave Resonances
• Three-body bound states of two bosons and one impurity in one dimension
• Three-body problem in a multiband Hubbard model
• Universal Efimov Scaling in the Rabi-Coupled Few-Body Spectrum
• Three-boson spectrum in the presence of 1D spin-orbit coupling: Efimov's generalized radial scaling law
• Spectral flow of trimer states of two heavy impurities and one light condensed boson
• Minlos-Faddeev regularization of zero-range interactions in the three-body problem
• Energetics and structural properties of two- and three-boson systems in the presence of 1D spin-orbit coupling