Quantum computers are powerful, but a practical quantum machine that’s useful for everyday tasks remains elusive. In fact, proponents of quantum computing say it could be another 10 years before there ...

The only snag was that “Shor’s algorithm”, as it is now known, required something that at the time only existed on university blackboards: a quantum computer. Chart: The Economist These days, quantum ...

The promise of quantum computers appears to be that they will upend modern computing as we know it. With exceptional computational power, they’ll be performing feats unimaginable for any classical ...