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- W2756191657 abstract "We present measurements of interspecies Feshbach resonances and subsequent creation of dual-species Bose-Einstein condensates of $^{23}mathrm{Na}$ and $^{39}mathrm{K}$. We prepare both optically trapped ensembles in the spin state $left|f = 1,m_{f}=-1rightrangle$ and perform atom loss spectroscopy in a magnetic field range from 0 to $700 , mathrm{G}$. The observed features include several s-wave poles and a zero crossing of the interspecies scattering length as well as inelastic two-body contributions in the $mathcal{M} = m_{mathrm{Na}}+m_{mathrm{K}} = -2$ submanifold. We identify and discuss the suitability of different magnetic field regions for the purposes of sympathetic cooling of K and achieving dual-species degeneracy. Two condensates are created simultaneously by evaporation at a magnetic field of about $150 , mathrm{G}$, which provides sizable intra- and interspecies scattering rates needed for fast thermalization. The impact of the differential gravitational sag on the miscibility criterion for the mixture is discussed. Our results serve as a promising starting point for the magnetoassociation into quantum degenerate $^{23}mathrm{Na}^{39}mathrm{K}$ Feshbach molecules." @default.
- W2756191657 created "2017-09-25" @default.
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- W2756191657 date "2018-02-13" @default.
- W2756191657 modified "2023-10-14" @default.
- W2756191657 title "Feshbach spectroscopy and dual-species Bose-Einstein condensation of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mmultiscripts><mml:mi>Na</mml:mi><mml:mprescripts /><mml:none /><mml:mn>23</mml:mn></mml:mmultiscripts><mml:mtext>−</mml:mtext><mml:mmultiscripts><mml:mi mathvariant=normal>K</mml:mi><mml:mprescripts /><mml:none /><mml:mn>39</mml:mn></mml:mmultiscripts></mml:mrow></mml:math> mixtures" @default.
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- W2756191657 doi "https://doi.org/10.1103/physreva.97.023623" @default.
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