# Observation of Rydberg blockade between two atoms - Quantum Physics

Abstract: We demonstrate experimentally that a single Rb atom excited to the$79d {5-2}$ level blocks the subsequent excitation of a second atom locatedmore than $10 \mu m m$ away. The observed probability of double excitation of$\sim 30%$ is consistent with a theoretical model based on calculations of thelong range dipole-dipole interaction between atoms.

Author: E. Urban, T. A. Johnson, T. Henage, L. Isenhower, D. D. Yavuz, T. G. Walker, M. Saffman

Source: https://arxiv.org/