Scientists create a longer-lasting exciton that may open new possibilities in quantum information science

https://phys.org/news/2023-04-scientists-longer-lasting-exciton-possibilities-quantum.html

"time-, spin-, and angle-resolved photoemission spectroscopy, which uses ultrafast pulses of light to probe the properties of electrons in a material. They worked with bismuth telluride, a well-studied topological insulator that offered the precise properties they needed: an electronic state combining the topological surface characteristics with those of the insulating bulk... characteristics both excitons and topological states... opto-spintronics and quantum computing"