Device-independent randomness amplification demonstrated with superconducting qubits (nature.com)

• First experimental device-independent randomness amplification with superconducting qubits
• Loophole-free Bell test as core component
• Quantum advantage: task classically impossible
• Publicly available data and code

"Researchers at ETH Zurich have experimentally demonstrated device-independent randomness amplification for the first time. Using superconducting qubits, a source of weak, correlated randomness was converted into nearly perfect random bits, certified by a loophole-free Bell test. The process is provably impossible by classical means, marking a definitive quantum advantage. The work combines theoretical advances with experimental control over superconducting circuits, achieving high Bell violations at high repetition rates. Potential applications include cryptographic key generation."