The multichannel nature of three-body recombination for ultracold K
arXiv:2011.07943 · doi:10.1103/PhysRevA.103.022825
Abstract
We develop a full multichannel spin model in momentum space to investigate three-body recombination of identical alkali-metal atoms colliding in a magnetic field. The model combines the exact three-atom spin structure and realistic pairwise atom-atom interactions. By neglecting the interaction between two particles when the spectating particle is not in its initial spin state we arrive at an approximate model. With this approximate model we achieve excellent agreement with the recent precise measurement of the ground Efimov resonance position in potassium-39 close to 33.58 G [Chapurin ., Phys. Rev. Lett. 123, 233402 (2019)]. We analyze the limitations of our approximation by comparing to the numerical results for the full system and find that it breaks down for Feshbach resonances at larger magnetic fields in the same spin channel. There the relevant three-body closed channel thresholds are much closer to the open channel threshold, which enhances the corresponding multichannel couplings. Therefore the neglected components of the interaction should be included for those Feshbach resonances.
References in corpus (30)
- Feshbach Resonances in Ultracold Gases
- Universality in Few-body Systems with Large Scattering Length
- Evidence for Efimov quantum states in an ultracold gas of cesium atoms
- Observation of an Efimov spectrum in an atomic system
- Universality in Three- and Four-Body Bound States of Ultracold Atoms
- Contact Measurements on Atomic BEC
- Three-boson problem near a narrow Feshbach resonance
- Observation of universality in ultracold 7Li three-body recombination
- Universality of the Three-Body Parameter for Efimov States in Ultracold Cesium
- Origin of the Three-body Parameter Universality in Efimov Physics
- Efimov Resonances in Ultracold Quantum Gases
- Universality of the three-body Efimov parameter at narrow Feshbach resonances
- Nuclear-spin-independent short-range three-body physics in ultracold atoms
- Analytical solution of the bosonic three-body problem
- Efimov physics beyond universality
- Microscopic Origin and Universality Classes of the Efimov Three-Body Parameter
- Physical Origin of the Universal Three-body Parameter in Atomic Efimov Physics
- Potassium ground state scattering parameters and Born-Oppenheimer potentials from molecular spectroscopy
- Adiabatic hyperspherical study of triatomic helium systems
- Universal van der Waals Physics for Three Ultracold Atoms
- Excited Thomas-Efimov levels in ultracold gases
- Precision Test of the Limits to Universality in Few-Body Physics
- Efimov states near a Feshbach resonance
- The Efimov effect in lithium 6
- Observation of Efimov Universality across a Non-Universal Feshbach Resonance in \textsuperscript{39}K
- Collisional relaxation of Feshbach molecules and three-body recombination in 87Rb Bose-Einstein condensates
- Finite-range effects in Efimov physics beyond the separable approximation
- Isotopic shift of atom-dimer Efimov resonances in K-Rb mixtures: Critical effect of multichannel Feshbach physics
- Magnetic quantum number resolved state-to-state chemistry
- Three-body Physics in Strongly Correlated Spinor Condensates
Cited by in corpus (14)
- Three-body recombination in physical chemistry
- Pinpointing Feshbach Resonances and Testing Efimov Universalities in K
- Spin-conservation propensity rule for three-body recombination of ultracold Rb atoms
- Multichannel effects in the Efimov regime from broad to narrow Feshbach resonances
- Strong spin-exchange recombination of three weakly interacting Li atoms
- Reshaped Three-Body Interactions and the Observation of an Efimov State in the Continuum
- Production and stabilization of a spin mixture of ultracold dipolar Bose gases
- Efimovian three-body potential from broad to narrow Feshbach resonances
- Emergent inflation of the Efimov spectrum under three-body spin-exchange interactions
- Energy-scaling of the product state distribution for three-body recombination of ultracold atoms
- Three-body spin mixing in spin-1 Bose-Einstein condensates
- A multichannel hyperspherical model for Efimov physics with van der Waals interactions controlled by a Feshbach resonance
- Spin structure of diatomic van der Waals molecules of alkali atoms
- Accurate simulation of Efimov physics in ultracold atomic gases with realistic three-body multichannel interactions