Finite-temperature Gutzwiller approximation from the time-dependent variational principle

Nicola Lanatà, Xiaoyu Deng, Gabriel Kotliar

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7 Scopus citations

Abstract

We develop an extension of the Gutzwiller approximation to finite temperatures based on the Dirac-Frenkel variational principle. Our method does not rely on any entropy inequality, and is substantially more accurate than the approaches proposed in previous works. We apply our theory to the single-band Hubbard model at different fillings, and show that our results compare quantitatively well with dynamical mean field theory in the metallic phase. We discuss potential applications of our technique within the framework of first-principle calculations.

Original languageEnglish (US)
Article number081108
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number8
DOIs
StatePublished - Aug 11 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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