MCXVChain#

class qiskit.circuit.library.MCXVChain(num_ctrl_qubits=None, dirty_ancillas=False, label=None, ctrl_state=None)[source]#

Bases: MCXGate

Implement the multi-controlled X gate using a V-chain of CX gates.

Create new MCX gate.

Attributes

condition_bits#: Get Clbits in condition.

ctrl_state#: Return the control state of the gate as a decimal integer.

decompositions#: Get the decompositions of the instruction from the SessionEquivalenceLibrary.

definition#: Return definition in terms of other basic gates. If the gate has open controls, as determined from self.ctrl_state, the returned definition is conjugated with X without changing the internal _definition.

duration#: Get the duration.

label#: Return instruction label

name#

Get name of gate. If the gate has open controls the gate name will become:

<original_name_o<ctrl_state>

where <original_name> is the gate name for the default case of closed control qubits and <ctrl_state> is the integer value of the control state for the gate.

num_ancilla_qubits#: The number of ancilla qubits.

num_clbits#: Return the number of clbits.

num_ctrl_qubits#

Get number of control qubits.

রিটার্নস:: The number of control qubits for the gate.
রিটার্ন টাইপ:: int

num_qubits#: Return the number of qubits.

params#

Get parameters from base_gate.

রিটার্নস:: List of gate parameters.
রিটার্ন টাইপ:: list
রেইজেস:: CircuitError -- Controlled gate does not define a base gate

unit#: Get the time unit of duration.

Methods

static get_num_ancilla_qubits(num_ctrl_qubits, mode='v-chain')[source]#

Get the number of required ancilla qubits.

inverse()[source]#: Invert this gate. The MCX is its own inverse.