dx.doi.org/10.1103/physreva.70.042703
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Robicheaux, F, Hernández, J. V, Topçu, T, & Noordam, L. D. (2004). Simulation of coherent interactions between Rydberg atoms. Phys. Rev. A, 70(Article number: 42703), 1–11. doi:10.1103/physreva.70.042703