Dynamical mean-field theory, density-matrix embedding theory, and rotationally invariant slave bosons: A unified perspective

Thomas Ayral, Tsung-Han Lee, and Gabriel Kotliar

Phys. Rev. B 96, 235139 – Published 26 December 2017

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.

Received 21 October 2017

DOI:https://doi.org/10.1103/PhysRevB.96.235139

Physics Subject Headings (PhySH)

Electronic structure

Strongly correlated systems

Gutzwiller approximation Hubbard model Slave bosons

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Thomas Ayral¹, Tsung-Han Lee¹, and Gabriel Kotliar^1,2

¹Physics and Astronomy Department, Rutgers University, Piscataway, New Jersey 08854, USA
²Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA

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Issue

Vol. 96, Iss. 23 — 15 December 2017

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