Quantum computers that are “practically useful” are 5-to-10 years away, Google Chief Executive Officer Sundar Pichai said, comparing the groundbreaking technology to where artificial intelligence was about a decade ago.

QuEra Computing said on Tuesday the neutral-atom quantum firm has completed a funding round in excess of $230 million, with investment from Google's Quantum AI business unit and SoftBank Vision Fund,

Google claims quantum computing could see real-world applications within five years, sparking debate among experts worldwide.