Two trapped ions (IMAGE) Universiteit van Amsterdam Caption Two trapped ions (in blue) are selected by optical tweezers (in red). A quantum gate between the ions can be implemented using electric fields. Credit UvA Usage Restrictions University of Amsterdam 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.