43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
---
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title: BosonicBasis (v0.29)
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description: API reference for qiskit.chemistry.components.bosonic_bases.BosonicBasis in qiskit v0.29
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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.chemistry.components.bosonic_bases.BosonicBasis
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---
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# BosonicBasis
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<Class id="qiskit.chemistry.components.bosonic_bases.BosonicBasis" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.9/qiskit/chemistry/components/bosonic_bases/bosonic_basis.py" signature="BosonicBasis" modifiers="class">
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Bases: `object`
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Basis to express a second quantization Bosonic Hamiltonian.
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## Methods
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<span id="qiskit-chemistry-components-bosonic-bases-bosonicbasis-convert" />
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### convert
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<Function id="qiskit.chemistry.components.bosonic_bases.BosonicBasis.convert" signature="BosonicBasis.convert(threshold=1e-06)">
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This prepares an array object representing a bosonic hamiltonian expressed in the harmonic basis. This object can directly be given to the BosonicOperator class to be mapped to a qubit hamiltonian.
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**Parameters**
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**threshold** (`float`) – the matrix elements of value below this threshold are discarded
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**Return type**
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`List`\[`List`\[`Tuple`\[`List`\[`List`\[`int`]], `float`]]]
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**Returns**
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List of modes for input to creation of a bosonic hamiltonian in the harmonic basis
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**Raises**
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**ValueError** – If problem with order value from computed modes
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</Function>
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</Class>
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