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We present a unified perspective on dynamical mean-field theory (DMFT), density-matrix embedding theory (DMET), and rotationally invariant slave bosons (RISB). We show that DMET can be regarded as a simplification… Click to show full abstract
We present a unified perspective on dynamical mean-field theory (DMFT), density-matrix embedding theory (DMET), and rotationally invariant slave bosons (RISB). We show that DMET can be regarded as a simplification of the RISB method where the quasiparticle weight is set to unity. This relation makes it easy to transpose extensions of a given method to another: For instance, a temperature-dependent version of RISB can be used to derive a temperature-dependent free-energy formula for DMET.
Keywords:
theory;
dynamical mean;
mean field;
unified perspective;
field theory;
density matrix
Journal Title: Physical Review B
Year Published: 2017
Link to full text (if available)
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Journal Title: Physical Review B
Year Published: 2017
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!