Google’s quantum money could make bitcoin obsolete

[Junior_]

Physics vs. Code: Why Google’s ‘Quantum Money’ Could Make Blockchain Obsolete

Google Quantum AI’s new research revisits a 1960s idea for unforgeable “quantum money,” exploring how physics, not code, could secure finance.

 

For more than a decade, the world of digital currency has been built on a single foundation: the blockchain.

This complex, code-based system of distributed ledgers was a revolutionary approach to creating digital scarcity and preventing counterfeiting.

But now, researchers at Google are exploring a concept that could bypass it entirely, securing money not through a chain of code but through the fundamental laws of physics.

This new research into "quantum money" offers an alternative to cryptocurrencies like Bitcoinand targets the very problem a blockchain was designed to solve.

 

 

 

If successful—a big if, since it presumes advanced quantum computers—it would effectively obviate the need for a blockchain's core technology, representing a fundamentally different path toward a secure digital future.

In a new study, dubbed "Anonymous Quantum Tokens with Classical Verification," researchers from Google Quantum AI, the University of Texas at Austin, and the Czech Academy of Sciences have advanced a decades-old idea for a theoretical currency secured by the unalterable laws of quantum mechanics.

The paper outlines a system where money is not just data on a ledger, but a unique quantum object whose integrity is guaranteed by the fabric of reality itself.

The Uncopyable Dollar

The concept hinges on one of the strangest and most powerful principles in physics: the “no-cloning theorem.”

This law states that it is impossible to create a perfect, independent copy of an unknown quantum state. While a string of data on a computer can be copied endlessly, a quantum state cannot.

“If you had a $1 bill that was actually a quantum state, you could prove, based on the properties of quantum mechanics, that copying such a state is impossible,” Dar Gilboa, a Google Quantum AI researcher and co-author of the study, told Decrypt. “You could only succeed with very small probability.”

In this system, counterfeiting isn't just computationally difficult, as in Bitcoin; it is physically forbidden.

 

Replacing the ledger with physics

This is where the technology becomes a direct threat to the blockchain model.

A blockchain's primary function is to prevent "double-spend" without a central authority. It does this by creating a massive, public, and unchangeable accounting book—the distributed ledger—that everyone watches.

Quantum money solves the same problem far more directly. You don't need a global ledger to track ownership history if the token itself is physically uncopyable and can only be spent once.

 

 

[nokia123]

Bitcoin investors andharu …gangarpanam 

[Junior_]

9 minutes ago, nokia123 said:

Bitcoin investors andharu …gangarpanam 

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[nokia123]

51 minutes ago, Junior_ said:

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[Sucker]

55 minutes ago, Junior_ said:

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[Junior_]

8 minutes ago, Sucker said:

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100%. 
 

vallaku munde thelisipothundi. General public Konchem late untaru.