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GGCE Documentation
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.. toctree::
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   overview
   installation
   tutorials
   modules
   project

The Generalized Green's Cluster Function Expansion (GGCE) is a numerically exact generalization of the Momentum Average family of methods used for solving electron-phonon Hamiltonians in the single-electron sector (the polaron limit). For a pedagogical introduction to Momentum Average methods, we recommend reading the `work of Mona Berciu <https://phas.ubc.ca/~berciu/PAPERS/papers.html>`__, specifically that of `Berciu and Fehske, PRB 82, 085116 (2010) <https://journals.aps.org/prb/abstract/10.1103/PhysRevB.82.085116>`__. The GGCE method itself is based off of `Carbone, Reichman & Sous, PRB 104, 035106 (2021) <https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.035106>`__.