CYGate¶

class
CYGate
(label=None, ctrl_state=None)[소스]¶ 기반 클래스:
qiskit.circuit.controlledgate.ControlledGate
ControlledY gate.
Circuit symbol:
q_0: ──■── ┌─┴─┐ q_1: ┤ Y ├ └───┘
Matrix representation:
\[\begin{split}CY\ q_0, q_1 = I \otimes 0 \rangle\langle 0 + Y \otimes 1 \rangle\langle 1 = \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & i \\ 0 & 0 & 1 & 0 \\ 0 & i & 0 & 0 \end{pmatrix}\end{split}\]참고
In Qiskit’s convention, higher qubit indices are more significant (little endian convention). In many textbooks, controlled gates are presented with the assumption of more significant qubits as control, which in our case would be q_1. Thus a textbook matrix for this gate will be:
┌───┐ q_0: ┤ Y ├ └─┬─┘ q_1: ──■──
\[\begin{split}CY\ q_1, q_0 = 0 \rangle\langle 0 \otimes I + 1 \rangle\langle 1 \otimes Y = \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & i \\ 0 & 0 & i & 0 \end{pmatrix}\end{split}\]Create new CY gate.
Methods Defined Here
Return inverted CY gate (itself).
Attributes

ctrl_state
¶ Return the control state of the gate as a decimal integer.
 반환 형식
int

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.
 반환 형식
List

duration
¶ Get the duration.

label
¶ Return instruction label
 반환 형식
str

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.
 반환 형식
str

num_ctrl_qubits
¶ Get number of control qubits.
 반환값
The number of control qubits for the gate.
 반환 형식
int

params
¶ Get parameters from base_gate.
 반환값
List of gate parameters.
 반환 형식
list
 예외
CircuitError – Controlled gate does not define a base gate

unit
¶ Get the time unit of duration.
