.. _sphx_glr_auto_examples_Solid_State_Physics_plot_sigma_GW.py:


GW self-energy
==============

A diagram containing double lines.




.. image:: /auto_examples/Solid_State_Physics/images/sphx_glr_plot_sigma_GW_001.png
    :align: center





.. code-block:: python

    import matplotlib.pyplot as plt
    from feynman import Diagram

    fig = plt.figure(figsize=(8,2))
    ax = fig.add_axes([0,0,1,1], frameon=False)

    ax.set_xlim(0, 1)
    ax.set_ylim(0,.25)

    # Sigma operator
    D = Diagram(ax)

    v11 = D.vertex([.1, .08])
    v12 = D.vertex(v11.xy, dx=.15)

    Sigma = D.operator([v11, v12])
    Sigma.text("$\Sigma$")

    # Symbols
    D.text(v12.x+.1, v12.y, "=")

    # GW convolution
    v21 = D.vertex(v12.xy, dxy=[0.2, -0.04])
    v22 = D.vertex(v21.xy, dx=0.4)

    l21 = D.line(v21, v22, style='double', arrow=True)

    # Specifying the number of wiggles and the amplitude of the wiggles
    l22 = D.line(v21, v22, style='double wiggly elliptic', nwiggles=5.5, amplitude=0.015)

    # 't' is the coordinate along the line (from 0 to 1)
    l21.text("G", t=0.4, y=.025, fontsize=24)
    l22.text("W", y=-.06, fontsize=24)

    # Plot and show
    D.plot()
    plt.show()

**Total running time of the script:** ( 0 minutes  0.049 seconds)



.. only :: html

 .. container:: sphx-glr-footer


  .. container:: sphx-glr-download

     :download:`Download Python source code: plot_sigma_GW.py <plot_sigma_GW.py>`



  .. container:: sphx-glr-download

     :download:`Download Jupyter notebook: plot_sigma_GW.ipynb <plot_sigma_GW.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.readthedocs.io>`_