The quantum computing arms race is starting to heat up.Rigetti Computing (RGTI -3.20%) has had a phenomenal July, with the stock up around 40% at the time of writing, although it was up around 50% just a few days ago. Most investors would be pleased with that return over a multiyear time frame, let alone one year. However, considering the reason behind Rigetti Computing's rapid rise, this could be the beginning of an even larger movement.Last week, Rigetti announced a breakthrough with its Ankaa-3 system, w ...