Nvidia CEO Jensen Huang is growing more bullish about quantum computing — and he expects they'll start solving real-world problems in the coming years. "Quantum computing is reaching an inflection point," Jensen declared during his keynote speech at Nvidia's GTC Paris developer conference Wednesday. Quantum computers are machines that use the laws of quantum mechanics to solve problems too complex for classical computers, which store information in bits (ones and zeroes). Quantum computers use quantum bits, or "qubits," which can be zero, one or something in between — the aim being to process much larger volumes of data to facilitate breakthroughs in areas like medicine, science and finance. Quantum has been a buzzy space for investors with the rise of several popular stocks, such as Rigetti Computing and IonQ , which on Monday acquired Oxford Ionics for $1.1 billion. Shares of Rigetti and IonQ were up 4.5% and 3.7% respectively in U.S. premarket trading.