Researchers find a way to purify photons, clearing major hurdles for faster quantum computers and ultra-secure networks.

"Quantum" may seem like a useless buzzword, but quantum computing is a real thing, and it's actually understandable even if ...

The Defiance Quantum ETF QTUM provides broad exposure and trades at roughly 23 times cash flow. Not cheap, but not insane for a sector where winners might return 50 times. It's up almost 40% so far ...