Schrödinger’s cash: Minting quantum money

from NewScientist:

Now the theoretical foundations are almost in place that could one day allow quantum cash to become a reality.

Since quantum money is just information, it can be stored and transmitted just like a digital picture or a text file. But because it has quantum properties too, it cannot be copied.

It is this combination that makes quantum cash so attractive: whoever is in possession of it has exclusive and unequivocal ownership of it, just as with hard, physical cash and unlike a credit card.

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