IonQ and Rigetti Computing took divergent paths to building quantum computers, but one is achieving greater success.The quantum computing industry is a promising area to invest in. Quantum machines can complete complex calculations in minutes that would take classical computers centuries, thanks to the power of quantum mechanics.In the sector, IonQ (IONQ -1.80%) and Rigetti Computing (RGTI -3.29%) are among the prominent players. IonQ uses ions to power its quantum machines while Rigetti employs the traditi ...