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Quantum Monte Carlo impurity solvers for multi-orbital problems and frequency-dependent interactions

Shinaoka, Hiroshi ; Assaad, F. ; Blümer, N. ; Werner, Philipp

In: The European Physical Journal Special Topics, 2017, vol. 226, no. 11, p. 2499–2523

The solution of an auxiliary quantum impurity system is the computationally expensive step in dynamical mean field theory simulations of lattice models and materials. In this review, we discuss Monte Carlo based impurity solvers, which are suitable for a wide range of applications. In particular, we present an efficient implementation of the hybridization expansion approach, which enables the...