Rovibronic Spectroscopy of Sympathetically Cooled <sup>40</sup>CaH<sup>+</sup>

Calvin, Aaron; Janardan, Smitha; Condoluci, John J.; Rugango, René; Pretzsch, Eric; Shu, Gang; Brown, Kenneth R.

doi:10.1021/acs.jpca.7b12823

Cited by 12 publications

(16 citation statements)

References 108 publications

(223 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previously, one-photon vibrational spectroscopy of sympathetically cooled molecular ion ensembles has been reported [3,34,[59][60][61][62]. However, in these experiments, the spectroscopy wave was along the trap axis and/or the laser linewidth was high, leading to highest line resolution of 2 × 10 7 (3 MHz absolute linewidth) [3].…”

Section: G Previous Results On High-resolution Spectroscopymentioning

confidence: 98%

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

et al. 2021

View full text Add to dashboard Cite

Optical spectroscopy in the gas phase is one of the key tools for the elucidation of the structure of atoms and molecules and their interaction with external fields. The line resolution is usually limited by a combination of first-order Doppler broadening due to particle thermal motion and of a short transit time through the excitation beam. For trapped particles, suitable laser cooling techniques can lead to strong

show abstract

Section: G Previous Results On High-resolution Spectroscopymentioning

confidence: 98%

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

et al. 2021

View full text Add to dashboard Cite

show abstract

“…For instance, by manipulating the electronic state population of the 40 Ca + ions we could control the K-Ca + interaction rate and increase the 40 Ca + ions lifetime in the presence of K atoms from 2 s to 12 s. Internal state cooling of molecular ions can be observed in the time scale of milliseconds. The already established resolved ro-vibrational spectroscopy measurement of CaH + [54] can be used for the detection of the internal cooling of CaH + . Once prepared in the ground state, the CaH + molecular ions are well suited for the test of fundamental theories such as time variation of the proton to electron mass ratio [55].…”

Section: Discussionmentioning

confidence: 99%

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Li,

Jyothi,

et al. 2020

Preprint

View full text Add to dashboard Cite

We present experimental evidence of charge exchange between laser-cooled potassium 39 K atoms and calcium 40 Ca + ions in a hybrid atom-ion trap and give quantitative theoretical explanations for the observations. The 39 K atoms and 40 Ca + ions are held in a magneto-optical (MOT) and a linear Paul trap, respectively. Fluorescence detection and high resolution time of flight mass spectra for both species are used to determine the remaining number of 40 Ca + ions, the increasing number of 39 K + ions, and 39 K number density as functions of time. Simultaneous trap operation is guaranteed by alternating periods of MOT and 40 Ca + cooling lights, thus avoiding direct ionization of 39 K by the 40 Ca + cooling light. We show that the K-Ca + charge-exchange rate coefficient increases linearly from zero with 39 K number density and, surprisingly, the fraction of 40 Ca + ions in the 4p 2 P 1/2 electronically-excited state. Combined with our theoretical analysis, we conclude that these data can only be explained by a process that starts with a potassium atom in its electronic ground state and a calcium ion in its excited 4p 2 P 1/2 state producing ground-state 39 K + ions and metastable, neutral Ca (3d4p 3 P1) atoms, releasing only 150 cm −1 equivalent relative kinetic energy. Chargeexchange between either ground-or excited-state 39 K and ground-state 40 Ca + is negligibly small as no energetically-favorable product states are available. Our experimental and theoretical rate coefficients are in agreement given the uncertainty budgets.

show abstract

“…5C). REMPD techniques were also used for the vibronic [62] and rovibronic [63] spectroscopy of sympathetically cooled CaH + ions (Fig. 5D).…”

Section: Destructive State-readout Techniquesmentioning

confidence: 99%

Molecular-ion quantum technologies

Sinhal¹,

Willitsch²

2022

Preprint

View full text Add to dashboard Cite

Quantum-logic techniques for state preparation, manipulation and non-destructive interrogation are increasingly being adopted for experiments on single molecular ions confined in traps. The ability to control molecular ions on the quantum level via a co-trapped atomic ion offers intriguing possibilities for new experiments in the realms of precision spectroscopy, quantum information processing, cold chemistry and quantum technologies with molecules. The present article gives an overview of the basic experimental methods, recent developments and prospects in this field.

show abstract

Rovibronic Spectroscopy of Sympathetically Cooled ⁴⁰CaH⁺

Cited by 12 publications

References 108 publications

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Molecular-ion quantum technologies

Contact Info

Product

Resources

About

Rovibronic Spectroscopy of Sympathetically Cooled 40CaH+

Cited by 12 publications

References 108 publications

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Molecular-ion quantum technologies

Contact Info

Product

Resources

About

Rovibronic Spectroscopy of Sympathetically Cooled ⁴⁰CaH⁺