期刊
PHYSICAL REVIEW A
卷 92, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.92.062701
关键词
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资金
- Marie Curie COFUND action through the ICFOnest program
- Foundation for Polish Science within the START program
- EU grant ERC AdG OSYRIS
- EU grant FP7 SIQS
- EU grant EQuaM
- Spanish Ministry grant FOQUS [FIS2013-46768]
- Generalitat de Catalunya [SGR 874]
- FETPROACT QUIC
The Ca+, Sr+, Ba+, and Yb+ ions immersed in an ultracold gas of the Cr atoms are proposed as experimentally feasible heteronuclear systems in which ion-atom interactions at ultralow temperatures can be controlled with magnetically tunable Feshbach resonances without charge transfer and radiative losses. Ab initio techniques are applied to investigate electronic-ground-state properties of the (CaCr)(+), (SrCr)(+), (BaCr)(+), and (YbCr)(+) molecular ions. The potential energy curves, permanent electric dipole moments, and static electric dipole polarizabilities are computed. The spin-restricted open-shell coupled-cluster method restricted to single, double, and noniterative triple excitations and the multireference configuration-interaction method restricted to single and double excitations are employed. The scalar relativistic effects are included within the small-core energy-consistent pseudopotentials. The leading long-range induction and dispersion interaction coefficients are also reported. Finally, magnetic Feshbach resonances between the Ca+, Sr+, Ba+, and Yb+ ions interacting with the Cr atoms are analyzed. The present proposal opens the way towards robust quantum simulations and computations with ultracold ion-atom systems free of radiative charge-transfer losses.
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