Quantum computing stocks collapsed in the early part of January, thanks in part to comments from the CEO of Nvidia. The companies have promising technology, but it is still many years away from commercialization.

There are plenty of doubts about the near-term prospects of quantum computing, but on Tuesday, the sector was powering ahead.

D-Wave, Rigetti Computing and Quantum Computing shares are now down by more than half on the year after critical commentary from tech executives.