Universal temperature dependence of the ion-neutral-neutral three-body recombination rate

Pérez‐Ríos, Jesús; Greene, Chris H.

doi:10.1103/physreva.98.062707

Cited by 34 publications

(35 citation statements)

References 27 publications

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“…While the rate constants for ion-atom-atom TBR in the semi-classical energy regime are comparatively well understood [20], much less is known about the subsequent kinetics of the reaction products, i.e. the kinetics of the produced molecular ions [21,22].…”

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confidence: 99%

Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate

et al. 2020

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We investigate inelastic collision dynamics of a single cold ion in a Bose-Einstein condensate. We observe rapid ion-atom-atom three-body recombination leading to formation of weakly bound molecular ions followed by secondary two-body molecule-atom collisions quenching the rovibrational states towards deeper binding energies. In contrast to previous studies exploiting hybrid ion traps, we work in an effectively field-free environment and generate a free low-energy ionic impurity directly from the atomic ensemble via Rydberg excitation and ionization. This allows us to implement an energy-resolved field-dissociation technique to trace the relaxation dynamics of the recombination products. Our observations are in good agreement with numerical simulations based on Langevin capture dynamics and provide complementary means to study stability and reaction dynamics of ionic impurities in ultracold quantum gases.

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confidence: 99%

Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate

et al. 2020

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“…The validity of Equation 4has been experimentally corroborated for Ba + + Rb + Rb collisions [85] for E k ∼ 10 mK. Moreover, it has been possible to derive a firstprinciple thermal-averaged three-body recombination rate for A + + A + A, where A is a noble gas atom, given by [81]…”

Section: An Atomic Ion In a Bath Of Ultracold Atomsmentioning

confidence: 73%

“…In three-body collisions involving charged and neutral particles, the charged-neutral interaction surpasses the neutral-neutral interaction in the energetic pooling towards three-body recombination, which translates into two important features. The first is that molecular ions are preferentially formed in comparison to neutral molecules [81,83,84], as it is sketched on panel (i) of Figure 3. In other words, reaction channel (2) is dominant for ion-atom-atom collisions.…”

Section: An Atomic Ion In a Bath Of Ultracold Atomsmentioning

confidence: 97%

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Cold chemistry: a few-body perspective on impurity physics of a single ion in an ultracold bath

Pérez‐Ríos

2021

Molecular Physics

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Impurity physics is a traditional topic in condensed matter physics that nowadays is being explored in the field of ultracold gases. Among the different classes of impurities, we focus on charged impurities in an ultracold bath. When a single ion is brought in contact with an ultracold gas, it is subjected to different reactive processes that can be understood from a cold chemistry perspective. In this work, we present an outlook of approaches for the dynamics of a single ion in a bath of ultracold atoms or molecules, complementing the usual many-body approaches characteristic of impurity physics within condensed matter physics. In particular, we focus on the evolution of a charged impurity in different baths, including external time-dependent trapping potentials, and explore the effect of the external laser sources present in ion-neutral hybrid traps on the reaction probability and evolution of an impurity.

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“…Our approach is based on a classical trajectory (CT) methodology in hyperspherical coordinates, which has been already applied to the three-body recombination of helium 9,41 and to ion-neutral-neutral three-body recombination processes. 12,13,42 Indeed, a direct three-body approach for the formation of vdW molecules has never been carried out via the CT method to the best of our knowledge. Performing these calculations, we notice a clear distinction between the formation rates at low-energy collisions and high-energy collisions, established by the dissociation energy of the X-RG potential.…”

Section: Introductionmentioning

confidence: 99%

On the formation of van der Waals complexes through three-body recombination

Mirahmadi

Pérez‐Ríos

2021

The Journal of Chemical Physics

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In this work, we show that van der Waals molecules X-RG (where RG is the rare gas atom) may be created through direct three-body recombination collisions, i.e., X + RG + RG → X-RG + RG. In particular, the three-body recombination rate at temperatures relevant for buffer gas cell experiments is calculated via a classical trajectory method in hyperspherical coordinates [Pérez-Ríos et al., J. Chem. Phys. 140, 044307 ( 2014)]. As a result, it is found that the formation of van der Waals molecules in buffer gas cells (1 K ≲ T ≲ 10 K) is dominated by the long-range tail (distances larger than the LeRoy radius) of the X-RG interaction. For higher temperatures, the short-range region of the potential becomes more significant. Moreover, we notice that the rate of formation of van der Walls molecules is of the same order of the magnitude independent of the chemical properties of X. As a consequence, almost any X-RG molecule may be created and observed in a buffer gas cell under proper conditions.

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Universal temperature dependence of the ion-neutral-neutral three-body recombination rate

Cited by 34 publications

References 27 publications

Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate

Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate

Cold chemistry: a few-body perspective on impurity physics of a single ion in an ultracold bath

On the formation of van der Waals complexes through three-body recombination

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