Introduction

THE GWL CODE

Why this code

This code has been conceived with the purpose of enabling GW calculations in large model structures, as for such systems sums over empty states become a serious issue we devised a method to eliminate them completely from the calculation.

Main features

  • GAWA approximation
  • Basis for polarizability operators: G vectors or optimal basis sets
  • No sums over empty states
  • Treatment of isolated and extended systems
  • Analytic continuation approach
  • collinear spin polarization

Main features not released yet or under development

  • Contour integration
  • off-diagonal self-energy terms
  • approximate treatment of semicore states
  • partially occupied states

DISCLAIMER:
These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.