Magnetically tunable Feshbach resonances in Li<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mspace width="0.16em" /><mml:mo>+</mml:mo><mml:mspace width="0.16em" /></mml:mrow></mml:math>Yb(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mn>3</mml:mn></mml:msup><mml:msub><mml:mi>P</mml:mi><mml:mi>J</mml:mi></mml:msub></mml:mrow></mml:math>)

González-Martínez, Maykel L.; Hutson, Jeremy M.

doi:10.1103/physreva.88.020701

Cited by 26 publications

(40 citation statements)

References 46 publications

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“…This has implications for the observation and use of such resonances [16][17][18]. In the very common case |a res | β bg , β(B) displays a peak of magnitude a res .…”

Section: Inelastic Scatteringmentioning

confidence: 99%

“…This may render decayed resonances unsuitable for tuning scattering lengths to large values [16]. In addition, inelastic rates usually peak sharply near resonance [17] and the resulting losses may make the resonances unsuitable for purposes such as magnetoassociation [18]. In other cases, Feshbach resonances can actually reduce inelastic cross sections, which might aid sympathetic cooling [15,19].…”

Section: Introductionmentioning

confidence: 99%

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Characterizing Feshbach resonances in ultracold scattering calculations

Frye

Hutson

2017

Phys. Rev. A

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Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modi ed, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We describe procedures for converging on and characterizing zero-energy Feshbach resonances that appear in scattering lengths for ultracold atomic and molecular collisions as a function of an external field. The elastic procedure is appropriate for purely elastic scattering, where the scattering length is real and displays a true pole. The regularized scattering length procedure is appropriate when there is weak background inelasticity, so that the scattering length is complex and displays an oscillation rather than a pole, but the resonant scattering length a res is close to real. The fully complex procedure is appropriate when there is substantial background inelasticity and the real and imaginary parts of a res are required. We demonstrate these procedures for scattering of ultracold 85 Rb in various initial states. All of them can converge on and provide full characterization of resonances, from initial guesses many thousands of widths away, using scattering calculations at only about ten values of the external field.

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“…This has implications for the observation and use of such resonances [16][17][18]. In the very common case |a res | β bg , β(B) displays a peak of magnitude a res .…”

Section: Inelastic Scatteringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterizing Feshbach resonances in ultracold scattering calculations

Frye

Hutson

2017

Phys. Rev. A

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“…By working in an optical lattice and/or using a fermionic Yb isotope, the inelastic effects of Yb*+Yb* collisions may be suppressed, allowing for a more precise investigation of interspecies phenomena in the mixture. We note that complementary theoretical work has already been initiated [11,29].…”

mentioning

confidence: 99%

“…This establishes a highly mass-mismatched atomic mixture where tunable anisotropic interactions are expected to play a strong role [11], laying a foundation for future studies of ultracold trapped paramagnetic polar molecules and Efimov trimers with very large mass imbalance [12]. We measure inelastic interactions in the mixture and observe the relative suppression of interspecies inelastic processes.…”

mentioning

confidence: 99%

Ultracold Heteronuclear Mixture of Ground and Excited State Atoms

et al. 2014

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We report on the realization of an ultracold mixture of lithium atoms in the ground state and ytterbium atoms in an excited metastable ( 3 P2) state. Such a mixture can support broad magnetic Feshbach resonances which may be utilized for the production of ultracold molecules with an electronic spin degree of freedom, as well as novel Efimov trimers. We investigate the interaction properties of the mixture in the presence of an external magnetic field and find an upper limit for the background interspecies two-body inelastic decay coefficient of K ′ 2 < 3 × 10 −12 cm 3 /s for the 3 P2 mJ = −1 substate. We calculate the dynamic polarizabilities of the Yb( 3 P2) magnetic substates for a range of wavelengths, and find good agreement with our measurements at 1064 nm. Our calculations also allow the identification of magic frequencies where Yb ground and metastable states are identically trapped and the determination of the interspecies van der Waals coefficients.Ultracold elemental mixtures provide unique opportunities to study few-and many-body physics with mass-mismatched atomic partners [1] and diatomic polar molecules [2, 3]. While the bulk of elemental mixture experiments have been performed using ground-state bialkali systems, the recent production of ground state mixtures of alkali and alkaline-earth-like atoms [4][5][6][7] further extend the experimental possibilities. These include powerful quantum simulation and information protocols [8] and tests of fundamental symmetries [9] with paramagnetic polar molecules. While tunable two-body interactions that are important for these advances have been proposed in such mixtures [10], they have not yet been experimentally detected.In this Letter we report the realization a new class of heteronuclear mixtures in which one atomic component is in an electronically excited state, using lithium ( 6 Li) and ytterbium ( 174 Yb) atoms. This establishes a highly mass-mismatched atomic mixture where tunable anisotropic interactions are expected to play a strong role [11], laying a foundation for future studies of ultracold trapped paramagnetic polar molecules and Efimov trimers with very large mass imbalance [12]. We measure inelastic interactions in the mixture and observe the relative suppression of interspecies inelastic processes. Our experimental methods also demonstrate new techniques of production and manipulation of spin components in the metastable 3 P 2 state of Yb.The study and control of anisotropic interactions is an increasingly important topic in ultracold atomic systems. In addition to their impact on many-body physics [3,8,13], anisotropic two-body interactions are proving to be of great interest for generating magnetically tunable interactions, as has been calculated theoretically [14] and observed experimentally in a mixture of ground and excited state Yb atoms [15]. The latter result applied in the context of the Li+Yb combination points to an alternative route towards tunable interactions, where the ground

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“…However, for these systems only very narrow Feshbach resonances are expected [42][43][44], and so far no resonance has been observed. This has triggered work towards mixtures involving metastable Yb( 3 P 2 ) [45,46], for which broader resonances are expected, however accompanied with strong inelastic two-body losses [47,48].…”

Section: Introductionmentioning

confidence: 99%

An ultracold, optically trapped mixture of 87Rb and metastable 4He atoms

et al. 2017

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Abstract. We report on the realization of an ultracold (<25 μK) mixture of rubidium ( 87 Rb) and metastable triplet helium ( 4 He) in an optical dipole trap. Our scheme involves laser cooling in a dual-species magneto-optical trap, simultaneous MW-and RF-induced forced evaporative cooling in a quadrupole magnetic trap, and transfer to a single-beam optical dipole trap. We observe long trapping lifetimes for the doubly spin-stretched spin-state mixture and measure much shorter lifetimes for other spin-state combinations. We discuss prospects for realizing quantum degenerate mixtures of alkali-metal and metastable helium atoms.

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Magnetically tunable Feshbach resonances in Li+Yb(3PJ)

Cited by 26 publications

References 46 publications

Characterizing Feshbach resonances in ultracold scattering calculations

Characterizing Feshbach resonances in ultracold scattering calculations

Ultracold Heteronuclear Mixture of Ground and Excited State Atoms

An ultracold, optically trapped mixture of 87Rb and metastable 4He atoms

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