Quantum cloning is a process that takes an arbitrary, unknown quantum state and makes an exact copy without altering the original state in any way. Quantum cloning is forbidden by the laws of quantum mechanics as shown by the no cloning theorem, which states that there is no operation for cloning any arbitrary state | ψ ⟩ A {\displaystyle {\displaystyle |\psi \rangle _{A}}} perfectly.
Quantum cloning is a process that takes an arbitrary, unknown quantum state and makes an exact copy without altering the original state in any way. Quantum cloning is forbidden by the laws of quantum mechanics as shown by the no cloning theorem, which states that there is no operation for cloning any arbitrary state | ψ ⟩ A {\displaystyle {\displaystyle |\psi \rangle _{A}}} perfectly.
Source: Wikipedia "Quantum cloning" · CC BY-SA 4.0
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