Metastability range of the Bose condensate in $\mathsf{^7}$ Li-fermion mixtures at T = 0Metastability range of the Bose condensate in $\mathsf{^7}$ Li-fermion mixtures at T = 0

Maria Laura Amoruso, M. P. Tosi, C. Minniti

The European Physical Journal DJan 1, 200012 citations

Towards fermionic superfluidity in ultracold Li-Rb mixtures

Michael Brown-Hayes, Qun Wei, Woojoong Kim +1 more

Bulletin of the American Physical SocietyMay 17, 20060 citations

Studies of Universality in Strongly Interacting 6 Li Fermi Gases with

Bragg Spectroscopy, E. D. Kuhnle

Jan 1, 20110 citations

Feshbach spectroscopy of ultracold mixtures of Li 6 and Dy 164 atoms

Ke Xie, Xi Li, Yu-Yang Zhou +7 more

We report on the observation of Feshbach resonances in ultracold $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures, where $^{6}\mathrm{Li}$ atoms are respectively prepared in their three lowest spin states and $^{164}\mathrm{Dy}$ atoms are prepared in their lowest-energy state. We observe 21 interspecies scattering resonances over a magnetic-field range from 0 to 702 G using atom loss spectroscopy, three of which exhibit relatively broad widths. These broad resonances provide precise control over the interspecies interaction strength, enabling the study of strongly interacting effects in $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures. Additionally, we observe a well-isolated interspecies resonance at 700.1 G, offering a unique platform to explore novel impurity physics, where heavy dipolar $^{164}\mathrm{Dy}$ atoms are immersed in a strongly interacting Fermi superfluid of $^{6}\mathrm{Li}$ atoms.We report on the observation of Feshbach resonances in ultracold $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures, where $^{6}\mathrm{Li}$ atoms are respectively prepared in their three lowest spin states and $^{164}\mathrm{Dy}$ atoms are prepared in their lowest-energy state. We observe 21 interspecies scattering resonances over a magnetic-field range from 0 to 702 G using atom loss spectroscopy, three of which exhibit relatively broad widths. These broad resonances provide precise control over the interspecies interaction strength, enabling the study of strongly interacting effects in $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures. Additionally, we observe a well-isolated interspecies resonance at 700.1 G, offering a unique platform to explore novel impurity physics, where heavy dipolar $^{164}\mathrm{Dy}$ atoms are immersed in a strongly interacting Fermi superfluid of $^{6}\mathrm{Li}$ atoms.

Physical Review AFeb 26, 20257 citations

Exploring an ultracold Fermi-Fermi mixture of $^{6}$ Li and $^{40}$ K atomsExploring an ultracold Fermi-Fermi mixture of $^{6}$Li and $^{40}$K atoms

Rudolf Grimm

Bulletin of the American Physical SocietyMay 29, 20080 citations

Feshbach Resonances in p -Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell Li6 and Closed-Shell Yb173 Atoms

Alaina Green, Hui Li, Jun Hui See Toh +6 more

We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes.Our system consists of open-shell alkali-metal 6 Li and closed-shell 173 Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK.We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of 6 Li and the nuclear spin of 173 Yb.Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature.Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum.The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures.We report on the observation of magnetic Feshbach resonances in a Fermi-Fermi mixture of ultracold atoms with extreme mass imbalance and on their unique p-wave dominated three-body recombination processes.Our system consists of open-shell alkali-metal 6 Li and closed-shell 173 Yb atoms, both spin polarized and held at various temperatures between 1 and 20 μK.We confirm that Feshbach resonances in this system are solely the result of a weak separation-dependent hyperfine coupling between the electronic spin of 6 Li and the nuclear spin of 173 Yb.Our analysis also shows that three-body recombination rates are controlled by the identical fermion nature of the mixture, even in the presence of s-wave collisions between the two species and with recombination rate coefficients outside the Wigner threshold regime at our lowest temperature.Specifically, a comparison of experimental and theoretical line shapes of the recombination process indicates that the characteristic asymmetric line shape as a function of applied magnetic field and a maximum recombination rate coefficient that is independent of temperature can only be explained by triatomic collisions with nonzero, p-wave total orbital angular momentum.The resonances can be used to form ultracold doublet ground-state molecules and to simulate quantum superfluidity in mass-imbalanced mixtures.

arXiv:1912.04874Physical Review XAug 14, 202055 citations

Stable mixtures of

^6

Li fermions in the three lowest energy spin states

Metastability range of the Bose condensate in

\mathsf{^7}

Li-fermion mixtures at T = 0

We report on the observation of Feshbach resonances in ultracold $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures, where

^{6}\mathrm{Li}

atoms are respectively prepared in their three lowest spin states and

^{164}\mathrm{Dy}

atoms are prepared in their lowest-energy state. We observe 21 interspecies scattering resonances over a magnetic-field range from 0 to 702 G using atom loss spectroscopy, three of which exhibit relatively broad widths. These broad resonances provide precise control over the interspecies interaction strength, enabling the study of strongly interacting effects in $^{6}\mathrm{Li}\text{\ensuremath{-}}^{164}\mathrm{Dy}$ mixtures. Additionally, we observe a well-isolated interspecies resonance at 700.1 G, offering a unique platform to explore novel impurity physics, where heavy dipolar

^{164}\mathrm{Dy}

atoms are immersed in a strongly interacting Fermi superfluid of

^{6}\mathrm{Li}

atoms.

Exploring an ultracold Fermi-Fermi mixture of

^{6}

Li and

^{40}

K atoms