by Ciro Santilli (@cirosantilli, 34)
The quantum NOT gate swaps the state of and , i.e. it maps:
(1)
As a result, this gate also inverts the probability of measuring 0 or 1, e.g.
  • if the old probability of 0 was 0, then it becomes 1
  • if the old probability of 0 was 0.2, then it becomes 0.8
Figure 1.
Quantum NOT gate symbol
. Source.

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  1. Single-qubit gate
  2. Quantum logic gate
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  4. Analog and digital quantum computers
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