Skip to main content


A small quantum leap New switching device could help build a dream: the ultrafast quantum Internet


Northwestern University researchers have developed a new switching device that takes quantum communication to a new level. The device is a practical step toward creating a network that takes advantage of the mysterious and powerful world of quantum mechanics.

The research — a demonstration of the first all-optical switch suitable for single-photon quantum communications — is published by the journal Physical Review Letters.

The National Science Foundation through their Integrative Graduate Education and Research Traineeship (IGERT) program supported the research. The title of the paper is “Ultrafast Switching of Photonic Entanglement.” In addition to Kumar, other authors of the paper are Matthew A. Hall and Joseph B. Altepeter, both from Northwestern.