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Google’s Quantum Money: Physics Could Replace Blockchain Google Quantum AI researchers have revived the 1960s concept of quantum money, a theoretical form of currency secured by the laws of physics rather than blockchain code. Based on the no-cloning theorem, these quantum tokens cannot be copied, making counterfeiting physically impossible. Unlike decentralized cryptocurrencies, this model would rely on a central issuer but use quantum mechanics to ensure privacy and trust. Though still purely theoretical, the research suggests a future where physics itself guarantees digital security—potentially making the blockchain’s energy-intensive consensus mechanisms obsoletùe .

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