Building useful quantum computers ‘in our direct line of sight’

May 2, 2026 - 04:54

A growing wave of startup activity suggests that useful quantum computers may arrive sooner than many experts predicted, according to researchers tracking the field. While the technology has long been seen as a distant goal, recent advances in hardware stability and error correction are shifting timelines.

Several new companies have emerged in the past year, each claiming progress toward machines that can solve problems beyond the reach of classical computers. These startups are not just theoretical labs but are building working prototypes, often with fewer than 50 qubits, that demonstrate error rates low enough for practical calculations.

"We are past the point of asking if quantum computing will be useful," one physicist involved in a recent project said. "The question now is how quickly we can scale up." The researcher noted that the pace of improvement in qubit coherence times and gate fidelities has been accelerating, driven by both academic breakthroughs and private investment.

Industry analysts caution that full-scale fault-tolerant quantum computers remain years away. But the emergence of startups with clear roadmaps and commercial partnerships suggests the technology is entering a new phase. Instead of waiting for a single giant leap, progress is coming from many small, iterative steps.

The shift has caught the attention of governments and large tech firms, which are now racing to secure talent and intellectual property. For the first time, the phrase "useful quantum computer" no longer sounds like science fiction. It sounds like an engineering challenge that is being solved, piece by piece, right now.