Nvidia chief executive Jensen Huang is meeting US officials and lawmakers in Washington this week amid reports that its export-controlled processors have been used to train advanced Chinese artificial intelligence models.Huang met with US Commerce Secretary Howard Lutnick on Tuesday, US outlet Axios reported, citing an anonymous source. Neither the US Commerce Department nor Nvidia confirmed that the meeting occurred, and its purpose was not disclosed.“Jensen is in DC to meet with leaders on both sides of the aisle to discuss Nvidia’s work to strengthen the country’s supply chain by producing US$500 billion in American technology over four years and…