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Strauss, C.; Takekoshi, T.; Lang, Florian; Winkler, Klaus; Grimm, Rudolf; Denschlag, Johannes Hecker; Tiemann, E.

doi:10.1103/physreva.82.052514

Cited by 132 publications

(168 citation statements)

References 44 publications

(69 reference statements)

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“…Here we use an extension that allows for a second-order spin-orbit interaction [29] and a hyperfine-contact interaction that depends on the internuclear separation R. The effect of this second correction was recently studied for Rb 2 [30]. Finally, we have…”

Section: B Feshbach Spectroscopymentioning

confidence: 99%

Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

et al. 2011

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We have studied magnetic Feshbach resonances in an ultracold sample of Na prepared in the absolute hyperfine ground state. We report on the observation of three s-, eight d-, and three g-wave Feshbach resonances, including a more precise determination of two known s-wave resonances, and one s-wave resonance at a magnetic field exceeding 200 mT. Using a coupled-channels calculation we have improved the sodium ground-state potentials by taking into account these new experimental data and derived values for the scattering lengths. In addition, a description of the molecular states leading to the Feshbach resonances in terms of the asymptotic-bound-state model is presented.

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Section: B Feshbach Spectroscopymentioning

confidence: 99%

Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

et al. 2011

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“…Instead, the most significant coupling between the atomic and molecular states is provided by the dependence of the hyperfine coupling constant of the alkali-metal atom on the internuclear distance R [19]. Such R dependences exist in alkali-metal dimers [31], but in that case they merely produce small shifts in bound-state energies and resonance positions, rather than driving new resonances. If the closed-shell atom has nonzero nuclear spin, it can also couple to the unpaired electron spin.…”

Section: Introductionmentioning

confidence: 99%

Prospects of forming ultracold molecules in2Σstates by magnetoassociation of alkali-metal atoms with Yb

2013

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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 explore the feasibility of producing ultracold diatomic molecules with nonzero electric and magnetic dipole moments by magnetically associating two atoms, one with zero electron spin and one with nonzero spin. Feshbach resonances arise through the dependence of the hyperfine coupling on internuclear distance. We survey the Feshbach resonances in diatomic systems combining the nine stable alkali-metal isotopes with those of Yb, focusing on the illustrative examples of RbYb and CsYb. We show that the resonance widths may expressed as a product of physically comprehensible terms in the framework of Fermi's golden rule. The resonance widths depend strongly on the background scattering length, which may be adjusted by selecting the Yb isotope, and on the hyperfine coupling constant and the magnetic field. In favorable cases the resonances may be over 100 mG wide.

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“…6(a) is about k max 2 = 5.3×10 −21 cm 3 s −1 , which is not far from the value of 1.25×10 −20 cm 3 s −1 obtained for 87 Rb on the potentials of Ref. [16]. Figure 9 shows a contour plot similar to function of magnetic field, as shown for 87 Rb in Fig.…”

Section: B Inelastic Collisions Of Rf-dressed 87 Rbmentioning

confidence: 57%

“…The potential curves for the singlet and triplet states are taken from Ref. [16] for Rb 2 and from Ref. [17] for K 2 .…”

Section: Methodsmentioning

confidence: 99%

“…In order to explore this, we have carried out L max = 0 calculations on a set of potentials modified at short range to allow adjustment of a s and a t . We retained the functional forms of the potential curves of Strauss et al [16], but modified the short-range matching point R SR to 3.5Å for the singlet potential and to 5.6Å for the triplet potential in order to provide sufficient flexibility to adjust the scattering lengths through a complete cycle. We then adjusted the short-range power N SR to obtain modified potentials with different scattering lengths, maintaining continuity of the potential and its derivative at R SR as described in Ref.…”

Section: B Inelastic Collisions Of Rf-dressed 87 Rbmentioning

confidence: 99%

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Inelastic losses in radio-frequency-dressed traps for ultracold atoms

Owens

Hutson

2017

Phys. Rev. A

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(2017) 'Inelastic losses in radio-frequency-dressed traps for ultracold atoms. ', Physical review A., 96 (4). 042707.Further information on publisher's website:https://doi.org/10.1103/PhysRevA.96.042707Publisher's copyright statement:Reprinted with permission from the American Physical Society: Owens, Daniel J. Hutson, Jeremy M. (2017). Inelastic losses in radio-frequency-dressed traps for ultracold atoms. Physical Review A 96(4): 042707 c 2017 by the American Physical Society. 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 calculate the rates of inelastic collisions for ultracold alkali-metal atoms in radio-frequency-dressed traps, using coupled-channel scattering calculations on accurate potential energy surfaces. We identify a radiofrequency-induced loss mechanism that does not exist in the absence of radio frequency (rf) radiation. This mechanism is not suppressed by a centrifugal barrier in the outgoing channel, and can be much faster than spin relaxation, which is centrifugally suppressed. We explore the dependence of the rf-induced loss rate on singlet and triplet scattering lengths, hyperfine splittings, and the strength of the rf field. We interpret the results in terms of an adiabatic model of the collision dynamics, and calculate the corresponding nonadiabatic couplings. The loss rate can vary by 10 orders of magnitude as a function of singlet and triplet scattering lengths. 87 Rb is a special case, where several factors combine to reduce rf-induced losses; as a result, they are slow compared to spin-relaxation losses. For most other alkali-metal pairs, rf-induced losses are expected to be much faster and may dominate.

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Hyperfine, rotational, and vibrational structure of thea3Σu+state ofRb

Cited by 132 publications

References 44 publications

Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

Prospects of forming ultracold molecules in2Σstates by magnetoassociation of alkali-metal atoms with Yb

Inelastic losses in radio-frequency-dressed traps for ultracold atoms

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