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"Exact real-time dynamics of single-impurity Anderson model from a single-spin hybridization-expansion" by P. Kubiczek, A. N. Rubtsov and A. I. Lichtenstein has received the Select label. Warm congratulations to the authors!

This novel paper presents a new computational approach for dynamics of quantum impurity models and other relevant topics for the condensed matter field. In particular, the authors present a modified real-time continuous-time hybridization-expansion quantum Monte Carlo solver for a time-dependent single-orbital Anderson impurity model. The presented method alleviates the dynamical sign problem by reducing the order of sampled diagrams and makes it possible to reach twice as long time scales in comparison to the standard method. This method is illustrated by calculating electric current through impurity in paramagnetic and spin-polarized cases. The idea of expanding around one single spin flavour could lead to further developments in the understanding of the cross-over between Falicov-Kimball and Hubbard physics.