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

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...

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Veröffentlicht in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-03, Vol.50 (3), p.213-219
Hauptverfasser: Cheinet, P., Pham, K.-L, Pillet, P., Beterov, I.I., Ashkarin, I.N., Tretyakov, D.B., Yakshina, E.A., Entin, V.M., Ryabtsev, I.I.
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Sprache:eng
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Zusammenfassung: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.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17253