MCMT¶
- class MCMT(gate, num_ctrl_qubits, num_target_qubits, label=None)[source]¶
Bases:
qiskit.circuit.quantumcircuit.QuantumCircuit
The multi-controlled multi-target gate, for an arbitrary singly controlled target gate.
For example, the H gate controlled on 3 qubits and acting on 2 target qubit is represented as:
───■──── │ ───■──── │ ───■──── ┌──┴───┐ ┤0 ├ │ 2-H │ ┤1 ├ └──────┘
This default implementations requires no ancilla qubits, by broadcasting the target gate to the number of target qubits and using Qiskit’s generic control routine to control the broadcasted target on the control qubits. If ancilla qubits are available, a more efficient variant using the so-called V-chain decomposition can be used. This is implemented in
MCMTVChain
.Create a new multi-control multi-target gate.
- Parameters
gate (
Union
[Gate
,Callable
[[QuantumCircuit
,Qubit
,Qubit
],Instruction
]]) – The gate to be applied controlled on the control qubits and applied to the target qubits. Can be either a Gate or a circuit method. If it is a callable, it will be casted to a Gate.num_ctrl_qubits (
int
) – The number of control qubits.num_target_qubits (
int
) – The number of target qubits.label (
Optional
[str
]) – The name for the controlled circuit block. If None, set to C-name where name is gate.name.
- Raises
AttributeError – If the gate cannot be casted to a controlled gate.
AttributeError – If the number of controls or targets is 0.
Methods Defined Here
Return the controlled version of the MCMT circuit.
Return the inverse MCMT circuit, which is itself.
Attributes
- ancillas¶
Returns a list of ancilla bits in the order that the registers were added.
- Return type
List
[AncillaQubit
]
- calibrations¶
Return calibration dictionary.
- The custom pulse definition of a given gate is of the form
{‘gate_name’: {(qubits, params): schedule}}
- Return type
dict
- clbits¶
Returns a list of classical bits in the order that the registers were added.
- Return type
List
[Clbit
]
- data¶
Return the circuit data (instructions and context).
- Returns
a list-like object containing the
CircuitInstruction
s for each instruction.- Return type
QuantumCircuitData
- extension_lib = 'include "qelib1.inc";'¶
- global_phase¶
Return the global phase of the circuit in radians.
- Return type
Union
[ParameterExpression
,float
]
- header = 'OPENQASM 2.0;'¶
- instances = 87¶
- label¶
Get label.
- metadata¶
The user provided metadata associated with the circuit
The metadata for the circuit is a user provided
dict
of metadata for the circuit. It will not be used to influence the execution or operation of the circuit, but it is expected to be passed between all transforms of the circuit (ie transpilation) and that providers will associate any circuit metadata with the results it returns from execution of that circuit.- Return type
dict
- num_ancilla_qubits¶
Return the number of ancillas.
- num_ancillas¶
Return the number of ancilla qubits.
- Return type
int
- num_clbits¶
Return number of classical bits.
- Return type
int
- num_parameters¶
Convenience function to get the number of parameter objects in the circuit.
- Return type
int
- num_qubits¶
Return number of qubits.
- Return type
int
- op_start_times¶
Return a list of operation start times.
This attribute is enabled once one of scheduling analysis passes runs on the quantum circuit.
- Return type
List
[int
]- Returns
List of integers representing instruction start times. The index corresponds to the index of instruction in
QuantumCircuit.data
.- Raises
AttributeError – When circuit is not scheduled.
- parameters¶
Convenience function to get the parameters defined in the parameter table.
- Return type
ParameterView
- prefix = 'circuit'¶