qiskit-documentation/docs/api/qiskit/0.29/qiskit.chemistry.components...

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---
title: initial_states (v0.29)
description: API reference for qiskit.chemistry.components.initial_states in qiskit v0.29
in_page_toc_min_heading_level: 2
python_api_type: module
python_api_name: qiskit.chemistry.components.initial_states
---
<span id="module-qiskit.chemistry.components.initial_states" />
<span id="qiskit-chemistry-components-initial-states" />
<span id="initial-states-qiskit-chemistry-components-initial-states" />
# Initial States
`qiskit.chemistry.components.initial_states`
These are chemistry specific Aqua Initial States where they inherit from Aqua [`InitialState`](qiskit.aqua.components.initial_states.InitialState "qiskit.aqua.components.initial_states.InitialState"). As they rely on chemistry specific knowledge and/or functions they live here rather than in Aqua.
# Initial States
| | |
| -------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
| [`HartreeFock`](qiskit.chemistry.components.initial_states.HartreeFock "qiskit.chemistry.components.initial_states.HartreeFock") | A Hartree-Fock initial state. |
| [`VSCF`](qiskit.chemistry.components.initial_states.VSCF "qiskit.chemistry.components.initial_states.VSCF") | Initial state for vibrational modes. |