Quantum computing hasn't hit the mainstream yet, but it's coming. Several companies are excited about the prospects of quantum computing and how it can transform how we do business. McKinsey & Company estimates that the quantum computing market could be worth up to $72 billion annually by 2035. That's a major market opportunity to capture. There are several competitors in this space, but I think three stocks are primed to do well. If you're looking to get started investing in quantum computing, I think these three make for an excellent core to build a section of your portfolio around. IonQ The biggest problem with quantum computing right now is inaccuracy. Quantum computers use particles to perform computations, and measuring what's happening at the atomic level is difficult in the presence of significant background noise. So inaccuracies can easily enter a calculation. Every company in the quantum computing space is trying to solve this problem, but nobody has technology as accurate as IonQ (IONQ 1.76%). While most companies struggle to reach 99.9% accuracy, IonQ has already achieved 99.99%. NYSE: IONQ Key Data Points As computing systems get larger, errors can compound. As a result, many available quantum computing devices are relatively small and cannot handle large workloads. However, IonQ is building a 256-qubit quantum computer using the same technology that enabled 99.99% accuracy. If this computer is successful, it puts IonQ on the fast track to becoming one of the top quantum computing investments. Alphabet Alphabet (GOOG 2.09%) (GOOGL 2.34%) is one of the legacy tech companies competing in quantum computing, and it has announced several breakthroughs. Alphabet is self-funding its quantum research, unlike others that must raise capital from the public markets. If it can develop a viable quantum computer, it already has the infrastructure set up to monetize it