Time Delays from One-?photon Transitions in the Continuum (image) ETH Zurich Department of Physics Share Print E-Mail Caption How large are the time delays from one-?photon transitions in the continuum? The group of Prof. Ursula Keller at ETH Zurich has now measured, for the first time, these slight changes in dynamics. Credit ETH Zurich/D-?PHYS, Jaco Fuchs / Sara Hartmann Usage Restrictions None Share Print E-Mail 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.