Laser control of ultracold molecule formation: The case of RbSr

Devolder, Adrien; Desouter-Lecomte, Michèle; Atabek, O.; Luc‐Koenig, E.; Dulieu, Olivier

doi:10.1103/physreva.103.033301

Cited by 18 publications

(11 citation statements)

References 81 publications

(100 reference statements)

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“…Work is underway to apply a number of techniques that have thus far been limited to a small subset of radical species to a larger range of reactants. For example, a number of research groups are actively working towards generating a range of ultracold open-shell molecules (such as CsYb, RbYb, RbSr and LiYb) 188 —with methods for studying ultracold bimolecular reaction dynamics recently developed. 166 Zeeman decelerators and magnetic guides have been utilised for the precise study of inelastic scattering processes, with such methods also likely to be applicable to the study of reactive collisions.…”

Section: Discussionmentioning

confidence: 99%

Low-temperature reaction dynamics of paramagnetic species in the gas phase

Miossec

Heazlewood

2022

Chem. Commun.

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Section: Discussionmentioning

confidence: 99%

Low-temperature reaction dynamics of paramagnetic species in the gas phase

Miossec

Heazlewood

2022

Chem. Commun.

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“…These Feshbach resonances could be used to create ultracold gases of RbSr molecules [29]. Other methods for the creation of these gases have also been proposed [31,32]. These gases are particularly interesting because the ground state of the RbSr molecule is a 2 Σ + state and has a relatively large permanent electric dipole moment, we found theoretical estimates ranging from 1.36 to 1.80 D [29,[33][34][35][36].…”

Section: Introductionmentioning

confidence: 73%

Ab initio study of the reactivity of ultracold RbSr + RbSr collisions

2022

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In this article we perform ab initio calculations in order to assess the reactivity of ultracold RbSr (2Σ+) + RbSr (2Σ+) collisions occurring on the singlet as well as the triplet potential. At ultracold energies reactions are energetically possible if they release energy, i.e., they are exoergic. The exoergicity of reactions between RbSr molecules producing diatomic molecules are known experimentally. We extend this to reactions producing triatomic molecules by calculating the binding energy of the triatomic reaction products. We find that, in addition to the formation of Rb2 and Rb2+Sr2 in singlet collisions, also the formation of Sr2Rb and Rb2Sr molecules in both singlet and triplet collisions is exoergic. Hence, the formation of these reaction products is energetically possible in ultracold collisions. For all exoergic reactions the exoergicity is larger than 1000 cm-1. We also find barrierless qualitative reaction paths leading to the formation of the Rb2Sr, Sr2Rb, and singlet Rb2 reaction products. These reaction paths imply the existence of a qualitative reaction path with a submerged barrier for the creation of the singlet Rb2+Sr2 reaction product. Because of the existence of these reactions we expect ultracold RbSr collisions to result in almost universal loss even on the triplet potential. Our results can be contrasted with collisions between alkali diatoms, where the formation of triatomic reaction products is endoergic, and with collisions between ultracold SrF molecules, where during triplet collisions only the spin-forbidden formation of singlet SrF2 is allowed.

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“…These Feshbach resonances could be used to create ultracold gases of RbSr molecules [26]. Other methods for the creation of these gases have also been proposed [28,29]. This gas is particularly interesting because the RbSr molecule has a 2 Σ + ground state with a relatively large permanent dipole moment, we found theoretical estimates ranging from 1.36 to 1.80 D [26,[30][31][32][33].…”

Section: Introductionmentioning

confidence: 74%

Ab initio study of the reactivity of ultracold RbSr$+$RbSr collisions

Man,

Karman,

Groenenboom

2021

Preprint

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In this article we perform ab initio calculations in order to assess the reactivity of ultracold RbSr ( 2 Σ + ) + RbSr ( 2 Σ + ) collisions occurring on the singlet as well as the triplet potential. At ultracold energies reactions are energetically possible if they release energy, i.e., they are exoergic. The exoergicity of reactions between RbSr molecules producing diatomic molecules are known experimentally. We extend this to reactions producing triatomic molecules by calculating the binding energy of the triatomic reaction products. We find that, in addition to the formation of Rb 2 and Rb 2 +Sr 2 in singlet collisions, also the formation of Sr 2 Rb and Rb 2 Sr molecules in both singlet and triplet collisions is exoergic. Hence, the formation of these reaction products is energetically possible in ultracold collisions. For all exoergic reactions the exoergicity is larger than 1000 cm −1 . We also find barrierless qualitative reaction paths leading to the formation of the Rb 2 Sr, Sr 2 Rb, and singlet Rb 2 reaction products. These reaction paths imply the existence of a qualitative reaction path with a submerged barrier for the creation of the singlet Rb 2 +Sr 2 reaction product. Because of the existence of these reactions we expect ultracold RbSr collisions to result in almost universal loss even on the triplet potential. Our results can be contrasted with collisions between alkali diatoms, where the formation of triatomic reaction products is endoergic, and with collisions between ultracold SrF molecules, where during triplet collisions only the spin-forbidden formation of singlet SrF 2 is allowed.

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Laser control of ultracold molecule formation: The case of RbSr

Cited by 18 publications

References 81 publications

Low-temperature reaction dynamics of paramagnetic species in the gas phase

Low-temperature reaction dynamics of paramagnetic species in the gas phase

Ab initio study of the reactivity of ultracold RbSr + RbSr collisions

Ab initio study of the reactivity of ultracold RbSr$+$RbSr collisions

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