Winter school on Physics with Trapped Charged Particles

Imaging Dark Trapped Ions For Ion-Atom Experiments

Not scheduled

20m

Ecole de Physique des Houches

Poster Session 1 Poster session 1

Speaker

Mr Nishant Joshi (Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560080, India )

Description

Abstract: Low temperature ion-atom interactions have been the object of growing interest over the past decade. Due to the availability of laser cooling for many atoms (Li, Na, K, Rb, Cs, Ca, Sr, Ba, Yb, etc.)[1,2,3] and ions (Ca+, Sr+, Ba+, Yb+ , etc)[4,6,7], the interactions between such ions and atoms have been explored experimentally at mK temperatures[5,7,8]. In the case of optically dark ions (such as Na+, K+, Rb+ and Cs+, for which optical transitions are not accessible via lasers) the ion-atom interactions are at Kelvin temperatures[7,8,9], There is therefore the need to study these dark ion systems at mK temperatures and below, because of the particularly interesting prospect of resonant charge exchange (RCE) interactions, in addition to the elastic collision channel for parent-daughter ion-atom system[10]. Moreover, low mass Alkali ion-atom system have alternate electronic configurations which allow potentials mediating the interactions to be computed with some simplicity.

To investigate these at mK temperatures, we have constructed the experiment described below, which can simultaneously trap Li+ and Ca+ ions. Here we present the results of simulations related to the crystallization of Ca+ and Li+ ion in their common region of stability. We propose a scheme for the characterization of optically dark Li+ ions via extraction on to a microchannel plate.

References:

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[2] J. Dalibard and C. Cohen-Tannoudji, J. Opt. Soc. Am. B 6, 2023-2045 (1989).

[3] William D. Phillips Rev. Mod. Phys. 70, 721 (1998)

[4] W. M. Itano and D. J. Wineland,Phys. Rev. A 25, 35 (1982).

[5] F. G. Major and H. G. Dehmelt. Exchange-Collision Technique for the rf Spectroscopy
of Stored Ions. Physical Review, 170(1):91–107,(1968).

[6] D. Leibfried, R. Blatt, C. Monroe, D. Wineland, Rev. Mod. Phys.
75, 281 (2003).

[7] Michal Tomza, Krzysztof Jachymski, Rene Gerritsma, Antonio Negretti, Tommaso Calarco, Zbigniew Idziaszek, Paul S. Julienne, arXiv:1708.07832v1[physics.atom-ph] (2017).

[8] I. Sivarajah, D. S. Goodman, J. E. Wells, F. A. Narducci, W. W. Smith,arXiv:1209.2106v3physics.atom-ph.

[9] Ravi, K., Lee, S., Sharma, A., Werth, G. & Rangwala, S. A.Cooling and stabilization by collisions in a mixed ion-atom system. Nat. Commun. 3, 1126 (2012).

[10] Sourav Dutta, S. A. Rangwala, arXiv:1705.07572v1[physics.atom-ph] (2017).