This REV gate swaps the order of the qubits. On a two qubit state, it does the following, for example:
|
Input |
Output |
|
|"00"> |
|"00"> |
|
|"01"> |
|"01"> |
|
|"10"> |
|"01"> |
|
|"11"> |
|"11"> |
The symbol for this gate is a cross over every wire of the circuit where the qubits are to be reversed. For example, for a three qubit reverse gate operating on a circuit of three qubits, it would be drawn as follows:
