2020/04/18 by P. Cheinet, K. -L. Pham, P. Pillet +6 · 1 citation
Physics and Astronomy · #physics.atom-ph #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1070/qel17253
published as Quantum Electronics 50(3) (2020) 213-219 · 9 pages, 4 figures
arxiv created 2020/04/18 · arxiv updated 2020/04/21
The three-body Förster resonances \rm 3× nP3/2 → nS1/2 +(n+1)S1/2 +nP3/2* controlled by a dc electric field were realized earlier by the authors in an ensemble of several cold Rydberg Rb atoms. One of the drawbacks of such resonances for potential application in three-qubit quantum gates is the proximity of the two-body Förster resonance \rm 2× nP3/2 → nS1/2 +(n+1)S1/2, as well as the possibility of their implementation only for states with values of the principal quantum numbers n≤ 38. In this paper we propose and analyze a three-body resonance of a new type \rm 3× nP3/2 → nS1/2 +(n+1)S1/2 +nP1/2 , which can be realized for arbitrary n. Its specific feature is also that the third atom transits into a state with a different total angular moment J=1/2, which has no Stark structure, so that the two-body resonance is completely absent. Numerical calculations showed that for not too strong interaction, it is possible to observe coherent three-body oscillation of the populations of collective states, which is of interest for developing new schemes of three-qubit quantum gates controlled by an electric field.