Double-degenerate Bose-Fermi mixture of strontium and lithium

Ye, Zhu-Xiong; Xie, Li-Yang; Guo, Zhen; Ma, Xiaobin; Wang, Gao‐Ren; You, Li; Tey, Meng Khoon

doi:10.1103/physreva.102.033307

Cited by 14 publications

(7 citation statements)

References 64 publications

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“…Mixtures of ultracold atomic gases provide an appealing platform for numerous avenues of research, including the realization of novel quantum phases [1][2][3][4][5][6][7], the formation of quantum droplets [8][9][10] and solitons [11,12], the study of collective dynamics [13][14][15], binary fluid dynamics and quantum turbulence [11,16], the investigation of Efimov physics [17][18][19][20], and the creation of ultracold polar molecules [21][22][23][24][25][26][27][28]. Early mixture experiments focused on bi-alkali-metal gases [29][30][31][32][33][34][35][36][37], but there is currently a growing interest in mixtures composed of alkali-metal and closed-shell atoms [38][39][40][41][42][43][44][45][46]...…”

Section: Introductionmentioning

confidence: 99%

Quantum degenerate mixtures of Cs and Yb

et al. 2021

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We report the production of quantum degenerate Bose-Bose mixtures of Cs and Yb with both attractive (Cs + 174 Yb) and repulsive (Cs + 170 Yb) interspecies interactions. Dual-species evaporation is performed in a bichromatic optical dipole trap that combines light at 1070 nm and 532 nm to enable control of the relative trap depths for Cs and Yb. Maintaining a trap which is shallower for Yb throughout the evaporation leads to highly efficient sympathetic cooling of Cs for both isotopic combinations at magnetic fields close to the Efimov minimum in the Cs three-body recombination rate at around 22 G. For Cs + 174 Yb, we produce quantum mixtures with typical atom numbers of N Yb ∼ 5 × 10 4 and N Cs ∼ 5 × 10 3 . We find that the attractive interspecies interaction (characterized by the scattering length a CsYb = −75a 0 ) is stabilized by the repulsive intraspecies interactions. For Cs + 170 Yb, we produce quantum mixtures with typical atom numbers of N Yb ∼ 4 × 10 4 and N Cs ∼ 1 × 10 4 . Here, the repulsive interspecies interaction (a CsYb = 96a 0 ) can overwhelm the intraspecies interactions, such that the mixture sits in a region of partial miscibility.

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Section: Introductionmentioning

confidence: 99%

Quantum degenerate mixtures of Cs and Yb

et al. 2021

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“…matrices. The parameters for the non-diagonal matrix elements between Σ and Π states contain the spin-orbit (AΣΠ) 2 and rotational (BΣΠ) interaction, where p stands for the expectation value of the ladder operator of the orbital angular momentum p =< L ± >. Assuming a weak variation of the spin-orbit interaction with internuclear separation we will model the v-dependence of this interaction by the overlap integral VΣΠ of the vibrational states vΣ and vΠ and simplify this also for the rotational part BΣΠ.…”

Section: Dunham Expansionmentioning

confidence: 99%

“…≈ 1.11 Debye for the nonrotating molecule in the vibrational ground state [1]. We mention only few examples, like the production of degenerated Bose-Fermi mixtures of Li and Sr [2] and the observation of Feshbach resonances in cold collisions of Rb and Sr [3]. In several studies Yb is replacing the alkaline earth part, e.g.…”

Section: Introductionmentioning

confidence: 99%

The electronic system $(2)^2Σ^+$ and $(1)^2Π$ of LiCa

Gerschmann¹,

Schwanke²,

Ospelkaus³

et al. 2022

Preprint

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High resolution Fourier transform spectroscopy and Laser induced fluorescence has been performed on LiCa in the infrared spectral range. We analyze rovibrational transitions of the (2) 2 Σ + -X(1) 2 Σ + system of LiCa and find the (2) 2 Σ + state to be perturbed by spin-orbit coupling to the (1) 2 Π state. We study the coupled system obtaining molecular parameters for the (2) 2 Σ + and the (1) 2 Π state together with effective spin-orbit and spin-rotation coupling constants. The coupled system has also been evaluated by applying a potential function instead of rovibrational molecular parameters for the state (2) 2 Σ + . An improved analytic potential function of the X(1) 2 Σ + state is derived, due to the extension of the observed rotational ladder.

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“…Mixtures of ultracold atomic gases provide an appealing platform for numerous avenues of research, including the realisation of novel quantum phases [1][2][3][4][5][6][7], the formation of quantum droplets [8][9][10] and solitons [11,12], the study of collective dynamics [13][14][15], binary fluid dynamics and quantum turbulence [11,16], the investigation of Efimov physics [17][18][19][20], and the creation of ultracold polar molecules [21][22][23][24][25][26][27][28]. Early mixture experiments focused on bi-alkali-metal gases [29][30][31][32][33][34][35][36][37], but there is currently a growing interest in mixtures composed of alkali-metal and closed-shell atoms [38][39][40][41][42][43][44][45][46]...…”

Section: Introductionmentioning

confidence: 99%

Quantum Degenerate Mixtures of Cs and Yb

Wilson,

Guttridge,

Segal

et al. 2020

Preprint

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We report the production of quantum degenerate Bose-Bose mixtures of Cs and Yb with both attractive (Cs + 174 Yb) and repulsive (Cs + 170 Yb) interspecies interactions. Dual-species evaporation is performed in a bichromatic optical dipole trap that combines light at 1070 nm and 532 nm to enable control of the relative trap depths for Cs and Yb. Maintaining a trap which is shallower for Yb throughout the evaporation leads to highly efficient sympathetic cooling of Cs for both isotopic combinations at magnetic fields close to the Efimov minimum in the Cs three-body recombination rate at around 22 G. For Cs + 174 Yb, we produce quantum mixtures with typical atom numbers of N Yb ∼ 5 × 10 4 and NCs ∼ 5 × 10 3 . We find that the attractive interspecies interaction (characterised by the scattering length a CsYb = −75 a0) is stabilised by the repulsive intraspecies interactions. For Cs + 170 Yb, we produce quantum mixtures with typical atom numbers of N Yb ∼ 4 × 10 4 , and NCs ∼ 1 × 10 4 . Here, the repulsive interspecies interaction (a CsYb = 96 a0) can overwhelm the intraspecies interactions, such that the mixture sits in a region of partial miscibility.

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Double-degenerate Bose-Fermi mixture of strontium and lithium

Cited by 14 publications

References 64 publications

Quantum degenerate mixtures of Cs and Yb

Quantum degenerate mixtures of Cs and Yb

The electronic system $(2)^2Σ^+$ and $(1)^2Π$ of LiCa

Quantum Degenerate Mixtures of Cs and Yb

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