期刊
SCIPOST PHYSICS
卷 7, 期 2, 页码 -出版社
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.7.2.016
关键词
-
资金
- DFG [SFB 925]
- DFG/RNF [16-42-01057/LI 1413/9-1]
In this work we introduce a modified real-time continuous-time hybridization-expansion quantum Monte Carlo solver for a time-dependent single-orbital Anderson impurity model: CT-1/2-HYB-QMC. In the proposed method the diagrammatic expansion is performed only for one out of the two spin channels, while the resulting effective single-particle problem for the other spin is solved semi-analytically for each expansion diagram. CT-1/2-HYB-QMC 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 CT-HYB method. We illustrate the new solver by calculating an electric current through impurity in paramagnetic and spin-polarized cases. Copyright P. Kubiczek et al. This work is licensed under the Creative Commons Attribution 4.0 International License. Published by the SciPost Foundation.
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