qiskit.circuit.library.MCPhaseGate¶

class MCPhaseGate(lam, num_ctrl_qubits, label=None)[ソース]¶

Multi-controlled-Phase gate.

This is a diagonal and symmetric gate that induces a phase on the state of the target qubit, depending on the state of the control qubits.

Circuit symbol:

    q_0: ───■────
            │
            .
            │
q_(n-1): ───■────
         ┌──┴───┐
    q_n: ┤ P(λ) ├
         └──────┘

参考

CPhaseGate: The singly-controlled-version of this gate.

Create new MCPhase gate.

__init__(lam, num_ctrl_qubits, label=None)[ソース]¶: Create new MCPhase gate.

Methods

`__init__`(lam, num_ctrl_qubits[, label])	Create new MCPhase gate.
`add_decomposition`(decomposition)	Add a decomposition of the instruction to the SessionEquivalenceLibrary.
`assemble`()	Assemble a QasmQobjInstruction
`broadcast_arguments`(qargs, cargs)	Validation and handling of the arguments and its relationship.
`c_if`(classical, val)	Add classical condition on register classical and value val.
`control`([num_ctrl_qubits, label, ctrl_state])	Controlled version of this gate.
`copy`([name])	Copy of the instruction.
`inverse`()	Return inverted MCU1 gate (\(MCU1(\lambda){\dagger} = MCU1(-\lambda)\))
`is_parameterized`()	Return True .IFF.
`mirror`()	DEPRECATED: use instruction.reverse_ops().
`power`(exponent)	Creates a unitary gate as gate^exponent.
`qasm`()	Return a default OpenQASM string for the instruction.
`repeat`(n)	Creates an instruction with gate repeated n amount of times.
`reverse_ops`()	For a composite instruction, reverse the order of sub-instructions.
`soft_compare`(other)	Soft comparison between gates.
`to_matrix`()	Return a Numpy.array for the gate unitary matrix.
`validate_parameter`(parameter)	Gate parameters should be int, float, or ParameterExpression

Attributes

`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.
`duration`	Get the duration.
`label`	Return gate label
`name`	Get name of gate.
`num_ctrl_qubits`	Get number of control qubits.
`params`	Get parameters from base_gate.
`unit`	Get the time unit of duration.

add_decomposition(decomposition)¶: Add a decomposition of the instruction to the SessionEquivalenceLibrary.

assemble()¶

Assemble a QasmQobjInstruction

戻り値の型: Instruction

broadcast_arguments(qargs, cargs)¶

Validation and handling of the arguments and its relationship.

For example, cx([q[0],q[1]], q[2]) means cx(q[0], q[2]); cx(q[1], q[2]). This method yields the arguments in the right grouping. In the given example:

in: [[q[0],q[1]], q[2]],[]
outs: [q[0], q[2]], []
      [q[1], q[2]], []

The general broadcasting rules are:

If len(qargs) == 1:
```
[q[0], q[1]] -> [q[0]],[q[1]]
```

If len(qargs) == 2:

[[q[0], q[1]], [r[0], r[1]]] -> [q[0], r[0]], [q[1], r[1]]
[[q[0]], [r[0], r[1]]]       -> [q[0], r[0]], [q[0], r[1]]
[[q[0], q[1]], [r[0]]]       -> [q[0], r[0]], [q[1], r[0]]

If len(qargs) >= 3:

[q[0], q[1]], [r[0], r[1]],  ...] -> [q[0], r[0], ...], [q[1], r[1], ...]

パラメータ

qargs (List) – List of quantum bit arguments.
cargs (List) – List of classical bit arguments.

戻り値の型

Tuple[List, List]

戻り値

A tuple with single arguments.

例外

CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.

c_if(classical, val)¶: Add classical condition on register classical and value val.

control(num_ctrl_qubits=1, label=None, ctrl_state=None)[ソース]¶

Controlled version of this gate.

パラメータ

num_ctrl_qubits (int) – number of control qubits.
label (str or None) – An optional label for the gate [Default: None]
ctrl_state (int or str or None) – control state expressed as integer, string (e.g. 『110』), or None. If None, use all 1s.

戻り値

controlled version of this gate.

戻り値の型

ControlledGate

copy(name=None)¶

Copy of the instruction.

パラメータ

name (str) – name to be given to the copied circuit, if None then the name stays the same.

戻り値

a copy of the current instruction, with the name: updated if it was provided

戻り値の型

qiskit.circuit.Instruction

property ctrl_state¶

Return the control state of the gate as a decimal integer.

戻り値の型: int

property decompositions¶: Get the decompositions of the instruction from the SessionEquivalenceLibrary.

property 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.

戻り値の型: List

property duration¶: Get the duration.

inverse()[ソース]¶: Return inverted MCU1 gate (\(MCU1(\lambda){\dagger} = MCU1(-\lambda)\))

is_parameterized()¶: Return True .IFF. instruction is parameterized else False

property label¶

Return gate label

戻り値の型: str

mirror()¶

DEPRECATED: use instruction.reverse_ops().

戻り値

a new instruction with sub-instructions: reversed.

戻り値の型

qiskit.circuit.Instruction

property 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.

戻り値の型: str

property num_ctrl_qubits¶

Get number of control qubits.

戻り値: The number of control qubits for the gate.
戻り値の型: int

property params¶

Get parameters from base_gate.

戻り値: List of gate parameters.
戻り値の型: list
例外: CircuitError – Controlled gate does not define a base gate

power(exponent)¶

Creates a unitary gate as gate^exponent.

パラメータ: exponent (float) – Gate^exponent
戻り値: To which to_matrix is self.to_matrix^exponent.
戻り値の型: qiskit.extensions.UnitaryGate
例外: CircuitError – If Gate is not unitary

qasm()¶

Return a default OpenQASM string for the instruction.

Derived instructions may override this to print in a different format (e.g. measure q[0] -> c[0];).

repeat(n)¶

Creates an instruction with gate repeated n amount of times.

パラメータ: n (int) – Number of times to repeat the instruction
戻り値: Containing the definition.
戻り値の型: qiskit.circuit.Instruction
例外: CircuitError – If n < 1.

reverse_ops()¶

For a composite instruction, reverse the order of sub-instructions.

This is done by recursively reversing all sub-instructions. It does not invert any gate.

戻り値

a new instruction with: sub-instructions reversed.

戻り値の型

qiskit.circuit.Instruction

soft_compare(other)¶

Soft comparison between gates. Their names, number of qubits, and classical bit numbers must match. The number of parameters must match. Each parameter is compared. If one is a ParameterExpression then it is not taken into account.

パラメータ: other (instruction) – other instruction.
戻り値: are self and other equal up to parameter expressions.
戻り値の型: bool

to_matrix()¶

Return a Numpy.array for the gate unitary matrix.

戻り値: if the Gate subclass has a matrix definition.
戻り値の型: np.ndarray
例外: CircuitError – If a Gate subclass does not implement this method an exception will be raised when this base class method is called.

property unit¶: Get the time unit of duration.

validate_parameter(parameter)¶: Gate parameters should be int, float, or ParameterExpression