Quantum Computing, Inc. (NASDAQ:QUBT) is one of the Jim Cramer’s Biggest Quantum Computing & Data Center Stock Hits. Quantum Computing, Inc. (NASDAQ:QUBT) is a computer hardware company that sells products such as an Entropy Quantum Computer and a sensor that uses quantum technology. Its shares are down by 14% over the past year and by 57% since Cramer discussed the firm in January 2025. Since then, the quantum computing sector has been dealt with a lot of blows to which Quantum Computing, Inc. (NASDAQ:QU ...