Three-body Förster resonance of a new type in Rydberg atoms

P. Cheinet, K. L. Pham, P. Pillet, I. I. Beterov, I. N. Ashkarin, D. B. Tretyakov, E. A. Yakshina, V. M. Entin, I. I. Ryabtsev

Research output: Contribution to journalArticlepeer-review


The three-body Förster resonances 3 nP3/2(|M|) →nS1/2 + (n + 1)S1/2 + nP3/2(|M∗|), controlled by a constant electric field, were realised 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 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. A three-body resonance of a new type, 3 nP3/2 → nS1/2 + (n + 1)S1/2 + nP1/2, which can be realised for arbitrary n, is proposed and analysed. Its specific feature is also that the third atom transits into a state with a different total angular momentum 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 oscillations of the populations of collective states, which is of interest for developing new schemes of three-qubit quantum gates controlled by an electric field.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalQuantum Electronics
Issue number3
Publication statusPublished - 1 Mar 2020


  • Rydberg atoms
  • interaction
  • Forster resonance

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