Two-Photon Controlled-Phase Logic Gate (IMAGE) Washington University in St. Louis Caption J.T. Shen is leading a team developing a two-photon controlled-phase logic gate that could boost quantum information science and technology. Credit Washington University in St. Louis Usage Restrictions Use allowed with credit to "Washington University in St. Louis" License Licensed 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.