Could a cryptocurrency running (at least partially) on a quantum computer (and/or on a quantum network) be developed in which it is physically impossible to double-spend? In other words, a coin in which it would be physically impossible to create two transactions that transfer the same coin from one address to two different addresses? Is there any published work on the subject, peer-reviewed or not? For example, if a coin is represented by an uncollapsed quantum state then according to No-cloning theorem it would be physically impossible (or only unlikely?) to transfer said coin to two different recipients, correct?

Edit: accepted the only answer. I don't think it applies here but at least this question shouldn't get deleted automatically...


I'm not sure how developed the idea is, but it sounds like you are describing the idea of quantum money.

Also, as it would be a new cryptocurrency, it would not be Bitcoin; Bitcoin is a particular cryptocurrency, and not all cryptocurrencies are Bitcoin in the same way that not all normal currency is US dollars.

  • $\begingroup$ I'm not sure if this is better as a comment or an answer, so I leaned towards the latter $\endgroup$
    – Ella Rose
    Jan 20 '18 at 14:43
  • $\begingroup$ I know that it wouldn't be bitcoin but that was the only cryptocurrency related tag I could find. $\endgroup$ Jan 20 '18 at 18:32
  • $\begingroup$ I found a more recent reference to quantum money but it also fails as a cryptocurrency because it seems to require a central entity with a secret: arxiv.org/abs/0912.3825 $\endgroup$ Jan 20 '18 at 18:39
  • $\begingroup$ @user1226313 Ah I see, well perhaps we can create a cryptocurrency tag - but first I want to make sure it is on topic for crypto.stackexchange. $\endgroup$
    – Ella Rose
    Jan 20 '18 at 19:10

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