Google developers have created a quantum digital token that will replace cryptocurrencies

Researchers from Google Quantum AI have introduced the concept of «quantum money» — a new type of digital token based not on code or blockchain but on the laws of quantum physics. In a new research paper titled «Anonymous Quantum Tokens with Classical Verification,» they describe how quantum computers can create uncopyable, anonymous payment units in the future, potentially becoming an alternative to bitcoin BTC $103,402.00 Mezo Wrapped BTC 0.84% Market capitalization $54.23 million VOL. 24 hours $2.49 billion and other crypto assets.

The concept is based on a fundamental principle of quantum mechanics, the no-cloning theorem, which states that it is impossible to create an exact copy of an unknown quantum state. In such a system, the central bank could generate unique quantum states using a secret random string, and users would use them as one-time tokens. After measuring the quantum state, a unique classical result is generated that the bank can verify, providing protection against counterfeiting.

Unlike the blockchain, the quantum token system does not require a complex computing infrastructure to verify transactions — security is guaranteed by the laws of quantum physics. The authors note that this technology can ensure not only the absolute uniqueness of each token but also a high level of user privacy.

The implementation of the concept, however, is still in the theoretical plane. To create such tokens, error-resistant quantum computers are needed, which, according to IBM and Quantinuum, may appear only in 2029−2030. Therefore, according to the researchers, practical tests of «quantum money» are expected no earlier than the next decade.

If the idea is developed, it could become a revolutionary step in financial systems — the creation of a currency directly protected by the laws of physics that can compete with cryptocurrencies and change the very nature of electronic money.