Rotationally invariant slave-boson and density matrix embedding theory: Unified framework and comparative study on the one-dimensional and two-dimensional Hubbard model

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  • Tsung Han Lee, Rutgers, the State University of New Jersey
  • ,
  • Thomas Ayral, Rutgers, the State University of New Jersey, Atos Quantum Laboratory
  • ,
  • Yong Xin Yao, Iowa State University
  • ,
  • Nicola Lanata
  • Gabriel Kotliar, Rutgers, the State University of New Jersey, Brookhaven National Laboratory

We present detailed benchmark ground-state calculations of the one- and two-dimensional Hubbard model utilizing the cluster extensions of the rotationally invariant slave-boson mean-field theory and the density matrix embedding theory. Our analysis shows that the overall accuracy and the performance of these two methods are very similar. Furthermore, we propose a unified computational framework that allows us to implement both of these techniques on the same footing. This provides us with a different line of interpretation and paves the ways for developing systematically distinct generalizations of these complementary approaches.

Original languageEnglish
Article number115129
JournalPhysical Review B
Publication statusPublished - Mar 2019

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