Université de Fribourg

Efficient implementation of the continuous-time hybridization expansion quantum impurity solver

Hafermann, Hartmut ; Werner, Philipp ; Gull, Emanuel

In: Computer Physics Communications, 2013, vol. 184, no. 4, p. 1280–1286

Strongly correlated quantum impurity problems appear in a wide variety of contexts ranging from nanoscience and surface physics to material science and the theory of strongly correlated lattice models, where they appear as auxiliary systems within dynamical mean-field theory. Accurate and unbiased solutions must usually be obtained numerically, and continuous-time quantum Monte Carlo algorithms,...

Université de Fribourg

Continuous-time hybridization expansion quantum impurity solver for multi-orbital systems with complex hybridizations

Shinaoka, Hiroshi ; Gull, Emanuel ; Werner, Philipp

In: Computer Physics Communications, 2017, vol. 215, p. 128–136

We describe an open-source implementation of the continuous-time hybridization- expansion quantum Monte Carlo method for impurity models with general instantaneous two-body interactions and complex hybridization functions. The code is built on an updated version of the core libraries of ALPS (Applications and Libraries for Physics Simulations) [ALPSCore libraries].