How reversible computing could change chip architecture
Hannah Earley, 31, cofounder and chief technology officer of Vaire Computing, is challenging a long-held assumption in chip design. Based in the UK, her startup is developing processors that capture and reuse energy typically lost as waste heat during computation. This approach, known as reversible computing, treats thermal output not as an unavoidable byproduct but as a design opportunity.
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Can this approach scale beyond niche applications?
Unlike traditional chips that erase information during processing—a step that inherently generates heat—reversible computing preserves data throughout operations, enabling energy recycling. Earley explains that by avoiding irreversible logic gates, such as AND or OR gates that lose information, the chip can operate closer to the theoretical limits of energy efficiency. Vaire’s early prototypes target specific workloads where reversibility can be implemented without sacrificing speed, using novel circuit designs that minimize resistance and leakage. The startup has secured initial funding from deep-tech investors and is collaborating with academic researchers to validate its models in simulation and silicon.
Scaling reversible computing faces hurdles, including the need for entirely new design tools and fabrication processes incompatible with current chipmaking workflows. Earley acknowledges that widespread adoption will require changes across the semiconductor ecosystem, from CAD software to manufacturing lines. However, she believes that as energy costs rise and sustainability pressures grow, even incremental adoption in high-performance or low-power domains could drive broader interest. Vaire is prioritizing partnerships with companies that have strict power budgets, hoping to demonstrate real-world gains within the next three years.
What makes reversible computing different from low-power chip design? Low-power design reduces energy use through efficiency tricks, but reversible computing aims to recover and reuse energy that would otherwise be lost as heat, going beyond conservation to active recycling.
Frequently Asked Questions
Is reversible computing only theoretical, or are there working prototypes? Vaire Computing has developed simulation models and is in the process of fabricating test chips, though no commercial product has been released yet; the technology remains in the pre-production phase.
Which industries might benefit first from this technology? Data centers, artificial intelligence accelerators, and battery-powered edge devices are early targets due to their high energy demands and sensitivity to thermal management.