With more than 400 Chinese companies on the U.S. Commerce Department's list of sanctioned firms — the so-called U.S. Entity List — it hardly even registers as news when more are added. But on the Wednesday before last Thanksgiving, the federal agency quietly made a bold announcement: eight more China-based “entities” were being added to the list, this time “to prevent U.S. emerging technologies from being used for the PRC’s quantum computing efforts.”  While the U.S. govern