Quantum Dot (image) Princeton University, Engineering School Caption A circuit uses microwaves to read the quantum state of an electron, a potentially scalable route to developing a quantum computer. Credit Jason Petta/Princeton University Usage Restrictions Non-commercial use only. 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.