The Washington Post: Surojit Sarkar thought he would be in New Delhi for just a few weeks. Now, more than three months later, Sarkar is still here, trapped in administrative limbo over his US work visa status. He says consular agents flagged his visa renewal application for security reasons.
Sarkar is one of thousands of highly skilled scientists, professors and technology workers from Beijing to Belarus who have been stranded in their home countries in recent months, upsetting their lives, their jobs and their children’s schooling. Many wonder whether the United States still wants its foreign scientists.
An ultracold atomic gas can sync into a single quantum state. Researchers uncovered a speed limit for the process that has implications for quantum computing and the evolution of the early universe.