.. _sphx_glr_api_gallery_statphys_landau_theory:

Landau mean-field theory
-------------------------

Order parameters, broken symmetry, and critical exponents from a free-energy expansion alone.


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    <div class="sphx-glr-thumbcontainer" tooltip="Rather than derive a phase transition from a microscopic Hamiltonian, Landau (1937) asked what the free energy must look like near a continuous transition, given only the symmetry of an order parameter m that the disordered phase forbids from appearing at odd powers:">

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  .. image:: /api/gallery/statphys/landau_theory/images/thumb/sphx_glr_plot_landau_mean_field_thumb.png
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  :doc:`/api/gallery/statphys/landau_theory/plot_landau_mean_field`

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      <div class="sphx-glr-thumbnail-title">Landau mean-field theory: order parameters from symmetry alone</div>
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    </div>


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   /api/gallery/statphys/landau_theory/plot_landau_mean_field