35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
---
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title: square
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description: API reference for qiskit.pulse.library.square
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in_page_toc_min_heading_level: 1
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python_api_type: function
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python_api_name: qiskit.pulse.library.square
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---
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# qiskit.pulse.library.square
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<Function id="qiskit.pulse.library.square" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.21/qiskit/pulse/library/discrete.py" signature="square(duration, amp, freq=None, phase=0, name=None)">
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Generates square wave [`Waveform`](qiskit.pulse.library.Waveform "qiskit.pulse.library.Waveform").
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For $A=$ `amp`, $T=$ `period`, and $\phi=$ `phase`, applies the midpoint sampling strategy to generate a discrete pulse sampled from the continuous function:
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$$
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f(x) = A \text{sign}\left[ \sin\left(\frac{2 \pi x}{T} + 2\phi\right) \right]
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$$
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with the convention $\text{sign}(0) = 1$.
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**Parameters**
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* **duration** (`int`) – Duration of pulse. Must be greater than zero.
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* **amp** (`complex`) – Pulse amplitude. Wave range is $[-$ `amp` $,$ `amp` $]$.
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* **freq** (`Optional`\[`float`]) – Pulse frequency, units of 1./dt. If `None` defaults to 1./duration.
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* **phase** (`float`) – Pulse phase.
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* **name** (`Optional`\[`str`]) – Name of pulse.
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**Return type**
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[`Waveform`](qiskit.pulse.library.Waveform "qiskit.pulse.library.waveform.Waveform")
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</Function>
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