The Efimov effect for three interacting bosonic dipoles

TL;DR

This paper demonstrates the persistence of the Efimov effect in three bosonic dipoles near a resonance, showing universal features and stability implications for ultracold dipolar gases.

Contribution

It provides numerical evidence that the Efimov effect persists in a non-conserved angular momentum system of three bosonic dipoles and explores its universal properties.

Findings

Efimov effect persists near a two-dipole resonance.

Efimov features become universal with a known three-body parameter.

Deeply-bound two-dipole states are stable against third dipole collisions.

Abstract

Three oriented bosonic dipoles are treated using the hyperspherical adiabatic representation, providing numerical evidence that the Efimov effect persists near a two-dipole resonance and in a system where angular momentum is not conserved. Our results further show that the Efimov features in scattering observables become universal, with a known three-body parameter, i.e. the resonance energies depend only on the two-body physics, which also has implications for the universal spectrum of the four-dipole problem. Moreover, the Efimov states should be long-lived, which is favorable for their creation and manipulation in ultracold dipolar gases. Finally, deeply-bound two-dipole states are shown to be relatively stable against collisions with a third dipole, owing to the emergence of a repulsive interaction originating in the angular momentum nonconservation for this system.