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arXiv · 2506.07302

Gor'kov-Hedin-Baym Equations for Quantum Many-Body Systems with Spin-Dependent Interactions

Christopher Lane
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Abstract

Driven by the need to understand and determine the presence of non-trivial superconductivity in real candidate materials, we present a generalized set of self-consistent Gor'kov-Hedin-Baym equations with spin dependent electron-electron and electron-phonon interactions. This extends Hedin's original equations to treat quantum many-body systems where electronic and lattice correlations along with relativistic effects coexist on the same footing with superconductivity. The leading order self-energies yields a generalization of the Migdal-Eliashberg theory and by iterating this set of equations generalized ladder vertex corrections naturally emerge.

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Christopher Lane. 2025-06-08. Gor'kov-Hedin-Baym Equations for Quantum Many-Body Systems with Spin-Dependent Interactions. https://doi.org/10.1103/fjsh-d48n

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