Unitary Operations

Unitary operations or gate operations are operations that can be executed on all universal quantum computers. The operations correspond to unitary transformations of the state of a quantum computer.

Unitary Matrix

Gate operations in qoqo/roqoqo provide a unitary_matrix() method that returns the definition of the gate in matrix form. This definition ignores the qubits the gates acts on to fit in the smallest possible matrix dimension.

• For single-qubit gates, the created matrix always corresponds to qubit=0 and has dimension 2x2.
• For two-qubit gates, the created matrix always corresponds to control=1, target=0 and has dimension a 4x4. See also the state ordering conventions.
• For multi-qubit gates, the created matrix always corresponds to qubits=[0..N] where N is the number of qubits in the qubit vector of the multi-qubit gate.

For a list of unitary operations see gate operations.