Feshbach resonances in an ultracold ${}^7$Li and ${}^{87}$Rb mixture

Abstract

We report on the observation of five Feshbach resonances in collisions between ultracold ${}^7$Li and ${}^{87}$Rb atoms in the absolute ground state mixture where both species are in their $|f,m_f>=|1,1>$ hyperfine states. The resonances appear as trap losses for the ${}^7$Li cloud induced by inelastic heteronuclear three-body collisions. The magnetic field values where they occur are important quantities for an accurate determination of the interspecies interaction potentials. Results of coupled channels calculations based on the observed resonances are presented and refined potential parameters are given. A very broad Feshbach resonance centered around 649 G should allow for fine tuning of the interaction strength in future experiments.

7 pages, 3 figures, 4 tables

References in corpus (12)

• Ultracold heteronuclear molecules in a 3D optical lattice
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Observation of Heteronuclear Feshbach Molecules from a ${}^{85}$Rb - ${}^{87}$Rb gas
• The coupling of the X${}^1{\Sigma }^{+}$ and a${}^3{\Sigma }^{+}$ states of KRb
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
• Potassium ground state scattering parameters and Born-Oppenheimer potentials from molecular spectroscopy
• Feshbach resonances in mixtures of ultracold ${}^6$Li and ${}^{87}$Rb gases
• Accurate near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy
• KRb Feshbach Resonances: Modeling the interatomic potential
• Ultracold Thermalization of ${}^7$Li and ${}^{87}$Rb
• Influence of a tight isotropic harmonic trap on photoassociation in ultracold homonuclear alkali gases

Cited by in corpus (16)

• Efimov States of Heavy Impurities in a Bose-Einstein Condensate
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Analyzing Feshbach resonances -- A ${}^6$Li -${}^{133}$Cs case study
• Anomalous Dimers in Quantum Mixtures near Broad Resonances: Pauli Blocking, Fermi Surface Dynamics and Implications
• Effects of Electric Fields on Heteronuclear Feshbach Resonances in Ultracold ${}^6\mathrm{Li}{-}^{87}\mathrm{Rb}$ Mixtures
• Short-range Photoassociation of LiRb
• Formation of deeply bound ultracold LiRb molecules via photoassociation near the Li 2S${}_{1/2}$ + Rb 5P${}_{3/2}$ asymptote
• Fermi-Bose Mixtures Near Broad Interspecies Feshbach Resonances
• Feshbach resonances in a nonseparable trap
• Quantum Defect Theory description of weakly bound levels and Feshbach resonances in LiRb
• Cross-dimensional relaxation of ${}^7$Li-${}^{87}$Rb atomic gas mixtures in a spherical-quadrupole magnetic trap
• Fast in situ observation of atomic Feshbach resonances by photoassociative ionization
• The $d{}^3\Pi$ state of LiRb
• Tunable Fujita-Miyazawa-Type Three-Body Force in Ultracold Atoms
• Genetics-based deperturbation analysis for the spin-orbit coupled ${\mathrm{A}}^1{\Sigma }^{+}$ and ${\mathrm{b}}^3{\Pi }_{0^{+}}$ states of LiRb
• Tuning of Efimov states in non-integer dimensions