Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.173402
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Funding
- RFBR [16-02-00383, 17-02-00987]
- Russian Science Foundation [16-12-00028]
- Siberian Branch of RAS
- Novosibirsk State University
- CYRAQS from Labex PALM [ANR-10-LABX-0039]
- EU H2020 FET Proactive project RySQ [640378]
- Russian Science Foundation [16-12-00028] Funding Source: Russian Science Foundation
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Three-body Forster resonances at long-range interactions of Rydberg atoms were first predicted and observed in Cs Rydberg atoms by Faoro et al. [Nat. Commun. 6, 8173 (2015)]. In these resonances, one of the atoms carries away an energy excess preventing the two-body resonance, leading thus to a Borromean type of Forster energy transfer. But they were in fact observed as the average signal for the large number of atoms N >> 1. In this Letter, we report on the first experimental observation of the three-body Forster resonances 3 x nP(3/2)(|M|) -> nS(1/2) + (n + 1)S-1/2 + nP(3/2)(|M*|) in a few Rb Rydberg atoms with n = 36, 37. We have found here clear evidence that there is no signature of the three-body Forster resonance for exactly two interacting Rydberg atoms, while it is present for N = 3-5 atoms. This demonstrates the assumption that three-body resonances can generalize to any Rydberg atom. As such resonance represents an effective three-body operator, it can be used to directly control the three-body interactions in quantum simulations and quantum information processing with Rydberg atoms.
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