Longer-lasting exciton breakthrough in quantum information science.

Scientists have created a long-lived exciton in a topological material using time-, spin-, and angle-resolved photoemission spectroscopy. The exciton is robust to disorder and retains the special spin properties inherent to topological surface states. This breakthrough opens up new research directions for optoelectronics and quantum computing, as longer exciton lifetimes and new ways of transferring information that don't rely on the charge of electrons are needed.