Mary-Russell Roberson for Trinity Communications While physicists and engineers are working on building the computers of tomorrow — quantum computers, that is — Yu Tong is pushing the field forward from a different angle. As a mathematician and a theorist, he works not with subatomic particles and lasers, but with pencil and paper, designing algorithms for quantum computers. “You have to use your quantum computers to do something and for that, you need algorithms,” said the new assistant...