Rydberg atomic force (IMAGE) National Institutes of Natural Sciences Caption Atoms in the optical lattice, trapped at a distance of 0.5 micron, are excited to the Rydberg state by the ultrafast excitation technique. Interaction between close Rydberg atoms results in the repulsive force. Credit Takafumi Tomita (Kenji Ohmori group) Usage Restrictions for use in stories about this research License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.