88 lines
1.8 KiB
Plaintext
88 lines
1.8 KiB
Plaintext
---
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title: IGate
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description: API reference for qiskit.circuit.library.IGate
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.circuit.library.IGate
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---
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# IGate
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<Class id="qiskit.circuit.library.IGate" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.18/qiskit/circuit/library/standard_gates/i.py" signature="IGate(label=None)" modifiers="class">
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Bases: `qiskit.circuit.gate.Gate`
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Identity gate.
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Identity gate corresponds to a single-qubit gate wait cycle, and should not be optimized or unrolled (it is an opaque gate).
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**Matrix Representation:**
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$$
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\begin{split}I = \begin{pmatrix}
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1 & 0 \\
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0 & 1
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\end{pmatrix}\end{split}
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$$
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**Circuit symbol:**
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```python
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┌───┐
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q_0: ┤ I ├
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└───┘
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```
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Create new Identity gate.
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## Methods Defined Here
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### inverse
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<Function id="qiskit.circuit.library.IGate.inverse" signature="IGate.inverse()">
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Invert this gate.
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</Function>
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## Attributes
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### decompositions
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<Attribute id="qiskit.circuit.library.IGate.decompositions">
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Get the decompositions of the instruction from the SessionEquivalenceLibrary.
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</Attribute>
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### definition
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<Attribute id="qiskit.circuit.library.IGate.definition">
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Return definition in terms of other basic gates.
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</Attribute>
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### duration
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<Attribute id="qiskit.circuit.library.IGate.duration">
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Get the duration.
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</Attribute>
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### label
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<Attribute id="qiskit.circuit.library.IGate.label">
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Return instruction label
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**Return type**
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`str`
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</Attribute>
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### params
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<Attribute id="qiskit.circuit.library.IGate.params">
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return instruction params.
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</Attribute>
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### unit
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<Attribute id="qiskit.circuit.library.IGate.unit">
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Get the time unit of duration.
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</Attribute>
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</Class>
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