This package solves the Bethe-Salpeter equation (BSE) in the dynamical mean-field theory (DMFT) and calculates the momentum-dependent static and dynamical susceptibilities in correlated electron systems. Necessary input to this package can be generated using DCore. Combined with DCore, this package offers investigations of two-particle responses in models and materials.

Features:

  • Computes the momentum-dependent spin/charge/orbital susceptibility in Matsubara-frequency domain.
  • Provides several approximation schemes, including BSE, SCL, RPA, and RRPA.
  • Runs as a post-processing step ofDCore.
    • Allows input from DFT packages via tight-binding bands in the Wannier90 format.
    • Supports the inclusion of spin-orbit coupling (SOC).

License

The ChiQ package is published under the GNU General Public License, version 3.

This package of ver.1.0 was developed under the support of “Project for advancement of software usability in materials science” by The Institute for Solid State Physics, The University of Tokyo.

Developers

ChiQ is developed by the following members:

  • ver. 1.0.0
    • Junya Otsuki (Okayama University)
    • Kazuyoshi Yoshimi (Institute for Solid State Physics, The University of Tokyo)
    • Hiroshi Shinaoka (Saitama University)
    • Yuichi Motoyama (Institute for Solid State Physics, The University of Tokyo)
    • Tatsumi Aoyama (Institute for Solid State Physics, The University of Tokyo)