2018/07/23 by I. I. Ryabtsev, I. I. Beterov, D. B. Tretyakov +4 · 1 citation
Physics and Astronomy · #physics.atom-ph #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.98.052703
published as Phys. Rev. A 98, 052703 (2018) · 14 pages, 5 figures. arXiv admin note: substantial text overlap with arXiv:1707.01636
arxiv created 2018/07/23 · arxiv updated 2018/11/21
We have observed recently the Stark-tuned three-body Förster resonances \rm 3× nP3/2 (|M|)→ nS1/2 +(n+1)S1/2 +nP3/2 (|M* |) at long-range interactions of a few cold Rb Rydberg atoms [D.B.Tretyakov et al., Phys. Rev. Lett. 119, 173402 (2017)]. The three-body resonance appears at a different dc electric field with respect to the ordinary two-body resonance \rm 2× nP3/2 (|M|)→ nS1/2 +(n+1)S1/2 and corresponds to a transition when the three interacting atoms change their states simultaneously (two atoms go to the S states, and the third atom remains in the P state but changes its moment projection), with the negligible contribution of the two-body resonance to the population transfer. It thus has a Borromean character and represents an effective three-body operator, which can be used to directly control the three-body interactions in quantum simulations and quantum gates implemented with Rydberg atoms. In this paper we theoretically investigate the coherence of such three-body resonances and we show that high-contrast Rabi-like population oscillations are possible for the localized Rydberg atoms in a certain spatial configuration. This paves the way to implementing three-qubit quantum gates and quantum simulations based on three-body Rydberg interactions.