Observation of elastic collisions between lithium atoms and calcium ions

Haze, Shinsuke; Hata, Sousuke; Fujinaga, Munekazu; Mukaiyama, Takashi

doi:10.1103/physreva.87.052715

Cited by 51 publications

(65 citation statements)

References 28 publications

(36 reference statements)

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“…The interest in combining in the laboratory ultracold atoms and ions is increased considerably in the last few years [1][2][3][4][5][6][7][8][9][10][11][12]. Their combination defines indeed a new quantum system characterised by an interaction with different energy and length scales with respect to ultracold atoms, which allows to study the formation of molecular ions [13,14], polarons [15], density bubbles [16], mesoscopic entanglement [17,18], novel ground state properties [19] and collective excitations [20], and quantum information processing [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Confinement-induced resonances in ultracold atom-ion systems

Melezhik

Negretti

2016

Phys. Rev. A

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We investigate confinement-induced resonances in a system composed by a tightly trapped ion and a moving atom in a waveguide. We determine the conditions for the appearance of such resonances in a broad region -from the "long-wavelength" limit to the opposite case when the typical length scale of the atom-ion polarisation potential essentially exceeds the transverse waveguide width. We find considerable dependence of the resonance position on the atomic mass which, however, disappears in the "long-wavelength and zero-energy" limit, where the known result for the confined atom-atom scattering is reproduced. We also derive an analytic and a semi-analytic formula for the resonance position in the "long-wavelength and zero-energy" limit and we investigate numerically how the position of the resonance is affected by a finite atomic colliding energy. Our results, which can be investigated experimentally in the near future, could be used to determine the atom-ion scattering length, the temperature of the atomic ensemble in the presence of an ion impurity, and to control the atom-phonon coupling in a linear ion crystal in interaction with a quasi one dimensional atomic quantum gas.

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Section: Introductionmentioning

confidence: 99%

Confinement-induced resonances in ultracold atom-ion systems

Melezhik

Negretti

2016

Phys. Rev. A

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“…As an example, the elastic and inelastic collision cross-sections between ultracold atoms and ions have been successfully determined for various atom-ion combinations [2][3][4][5][6][7][8][9]. More recently, a charge exchange collision, which is one of the elementary processes occurring in chemical reactions, was observed at the single-particle level using a trapped 174 Yb + ion immersed in a BoseEinstein condensate of 87 Rb atoms [7].…”

Section: Introductionmentioning

confidence: 99%

Charge-exchange collisions between ultracold fermionic lithium atoms and calcium ions

et al. 2015

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Charge exchange collisions between ultracold fermionic 6 Li atoms and 40 Ca + ions are observed in the mK temperature range. The reaction product of the charge exchange collision is identified via mass spectrometry during which the motion of the ions is excited parametrically. The crosssections of the charge exchange collisions between 6 Li atoms in the ground state and 40 Ca + ions in the ground and metastable excited states are determined. Investigation of the inelastic collision characteristics in the atom-ion mixture is an important step toward ultracold chemistry based on ultracold atoms and ions.

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“…Typically, the neutral trap consists of a magneto-optical trap (MOT) [2][3][4][5], an optical dipole trap (ODT) [6], or a magnetically trapped Bose-Einstein conden sate (BEC) [7,8]. Recently, a hybrid trap was developed that also incorporates an optical cavity [9].…”

Section: Introductionmentioning

confidence: 99%

Measurement of the low-energyNa+−Natotal collision rate in an ion-neutral hybrid trap

et al. 2015

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We present measurements of the total elastic and resonant charge-exchange ion-atom collision rate coefficient jtia of cold sodium (Na) with optically dark low-energy Na+ ions in a hybrid ion-neutral trap. To determine ka, we measured the trap loading and loss rates from both a Na magneto-optical trap (MOT) and a linear radio-frequency quadra pole Paul trap. We found the total rate coefficient to be 7.4 ± 1.9 x 10~8 cm3/s for the type-I Na MOT immersed within an «140-K ion cloud and 1.10 ± 0.25 x 10"7 cm3/s for the type-II Na MOT within an « 1070-K ion cloud. Our measurements show excellent agreement with previously reported theoretical fully quantal ah initio calculations. In the process of determining the total rate coefficient, we demonstrate that a MOT can be used to probe an optically dark ion cloud's spatial distribution within a hybrid trap.

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Observation of elastic collisions between lithium atoms and calcium ions

Cited by 51 publications

References 28 publications

Confinement-induced resonances in ultracold atom-ion systems

Confinement-induced resonances in ultracold atom-ion systems

Charge-exchange collisions between ultracold fermionic lithium atoms and calcium ions

Measurement of the low-energyNa+−Natotal collision rate in an ion-neutral hybrid trap

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