qib.operator.gates.ControlledGate¶

class qib.operator.gates.ControlledGate(tgate: Gate, ncontrols: int, ctrl_state: Sequence[int] | None = None)[source]¶

Bases: Gate

A controlled quantum gate with an arbitrary number of control qubits. The control qubits have to be set explicitly. The target qubits (or particles) are specified via the target gate.

Methods

`as_circuit_matrix`	Generate the sparse matrix representation of the gate as element of a quantum circuit.
`as_matrix`	Generate the matrix representation of the controlled gate. Format: \|control> x \|target>.
`as_qasm`	Generate a Qobj OpenQASM representation of the gate.
`as_tensornet`	Generate a tensor network representation of the gate.
`fields`	Return the list of fields hosting the quantum particles which the gate acts on.
`inverse`	Return the inverse operator.
`is_hermitian`	Whether the gate is Hermitian.
`is_unitary`	A quantum gate is unitary by definition.
`particles`	Return the list of quantum particles the gate acts on.
`set_control`	Set the control qubits.
`target_gate`	Get the target gate.

Attributes

`num_controls`	The number of control qubits.
`num_wires`	The number of "wires" (or quantum particles) this gate acts on.

as_circuit_matrix(fields: Sequence[Field])[source]¶: Generate the sparse matrix representation of the gate as element of a quantum circuit.

as_matrix()[source]¶: Generate the matrix representation of the controlled gate. Format: |control> x |target>

as_qasm()[source]¶: Generate a Qobj OpenQASM representation of the gate.

as_tensornet()[source]¶: Generate a tensor network representation of the gate.

fields()[source]¶: Return the list of fields hosting the quantum particles which the gate acts on.

inverse()[source]¶: Return the inverse operator.

is_hermitian()[source]¶: Whether the gate is Hermitian.

is_unitary()[source]¶: A quantum gate is unitary by definition.

property num_controls¶: The number of control qubits.

property num_wires¶: The number of “wires” (or quantum particles) this gate acts on.

particles()[source]¶: Return the list of quantum particles the gate acts on.

set_control(*args)[source]¶: Set the control qubits.

target_gate()[source]¶: Get the target gate.