MCXGrayCode

class qiskit.circuit.library.MCXGrayCode(num_ctrl_qubits=None, label=None, ctrl_state=None, *, _base_label=None)

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Bases: MCXGate

Implement the multi-controlled X gate using the Gray code.

This delegates the implementation to the MCU1 gate, since $X = H \cdot U1(\pi) \cdot H$ .

Create new MCX gate.

Methods

Parameters

num_ctrl_qubits (Optional[int]) –
label (Optional[str]) –
ctrl_state (Optional[Union[str, int]]) –

inverse

inverse(annotated=False)

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Invert this gate. The MCX is its own inverse.

Parameters

annotated (bool) – when set to True, this is typically used to return an AnnotatedOperation with an inverse modifier set instead of a concrete Gate. However, for this class this argument is ignored as this gate is self-inverse.

Returns

inverse gate (self-inverse).

Return type

MCXGrayCode