The race for quantum supremacy is not just between technology companies, but also between nation-states. Why it matters: The first country to produce effective and functional quantum computers will have a major advantage in economics, cybersecurity and security, and the US, China and Europe are all competitive. What is happening: Last month, the Department of Commerce added a dozen Chinese companies on a trade blacklist in an effort to prevent the use of new US technologies for quantum computing efforts that would boost Beijing’s military. - It was the latest move in a technology trade war between Washington and Beijing...