Physicists have found an unlikely collaborator in the effort to make quantum computers less power-hungry: the sun.
According to Scientific American, researchers have harnessed sunlight to produce quantum entanglement — the strange linkage in which two particles behave as mirrors of each other. As the publication describes it, the sun turns out to be "surprisingly good at quantum mechanics."
That matters because of how one leading style of quantum computer is built. Scientific American notes that at the foundation of photonic quantum computing are pairs of light particles, joined through entanglement so that each one reflects the state of its partner. Those entangled pairs are the raw material the machine computes with. Today they have to be manufactured with specialized laboratory equipment; the reporting frames sunlight as a possible alternative source.
The headline claim, as summarized by Scientific American and circulated through aggregators including Google News and Bing News, is an energy one: sunlight could be the key to making quantum computers less energy-hungry. In other words, the resource the machine needs most is already falling on the roof, for free, all day.
A caveat worth stating plainly: the available reporting describes the finding, not a shipped product. There is no indication here of a commercial sunlight-powered quantum computer, and no performance figures accompany the claim in these summaries.
Still, the direction of travel is notable. Quantum computing has spent years being described as a technology that consumes enormous resources — cooling, lasers, precision hardware — in exchange for a narrow set of capabilities. Cutting the energy bill changes the arithmetic of whether these machines are worth running at scale.
Why it matters: if entangled light can be sourced from the sun instead of built by expensive, power-hungry lab equipment, one of quantum computing's biggest practical obstacles — its appetite for energy — gets meaningfully smaller.