These firms are building technology that could upend the computer industry. Quantum computers promise to revolutionize computing as we know it, making it a promising industry to invest in. For example, Alphabet-owned Google's quantum computer completed a complex calculation in six seconds that would have taken 47 years with a supercomputer. This demonstrates quantum advantage, a term describing when quantum machines can outperform today's computers. Quantum computing uses subatomic particles, called qubits, ...