Google’s Willow Chip Achieves Verifiable Quantum Advantage
In October 2025, Google’s Willow quantum processor achieved verifiable quantum advantage, marking the first time a quantum computer performed a calculation beyond the reach of classical systems with a result that can be efficiently verified.
- The experiment, demonstrated a quantum phenomenon called “quantum echoes” — a butterfly-effect-like behaviour in which small changes ripple chaotically through a quantum system.
- Willow completed the calculation 13,000 times faster than the Frontier supercomputer, which would take roughly 150 years to reproduce the result using classical computation.
- The verification can be done by another quantum computer of similar capability, overcoming one of the key challenges of quantum computing ....
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