PhaseGate

class qiskit.circuit.library.PhaseGate(theta, label=None)

기반 클래스: Gate

Single-qubit rotation about the Z axis.

This is a diagonal gate. It can be implemented virtually in hardware via framechanges (i.e. at zero error and duration).

Can be applied to a QuantumCircuit with the p() method.

Circuit symbol:

     ┌──────┐
q_0: ┤ P(λ) ├
     └──────┘

Matrix Representation:

\[\begin{split}P(\lambda) = \begin{pmatrix} 1 & 0 \\ 0 & e^{i\lambda} \end{pmatrix}\end{split}\]

Examples:

\[P(\lambda = \pi) = Z\]

\[P(\lambda = \pi/2) = S\]

\[P(\lambda = \pi/4) = T\]

더 보기

RZGate: This gate is equivalent to RZ up to a phase factor.

\[P(\lambda) = e^{i{\lambda}/2} RZ(\lambda)\]

Reference for virtual Z gate implementation: 1612.00858

Create new Phase gate.

Attributes

condition_bits

Get Clbits in condition.

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 instruction label

name

Return the name.

num_clbits

Return the number of clbits.

num_qubits

Return the number of qubits.

params

return instruction params.

unit

Get the time unit of duration.

Methods

control(num_ctrl_qubits=1, label=None, ctrl_state=None)

Return a (multi-)controlled-Phase gate.

매개변수:

• 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.

반환:

controlled version of this gate.

반환 형식:

ControlledGate

inverse()

Return inverted Phase gate (\(Phase(\lambda)^{\dagger} = Phase(-\lambda)\))

power(exponent)

Raise gate to a power.