Record Details

Title:
Exact real-time dynamics of single-impurity Anderson model from a single-spin hybridization-expansion
Affiliation(s):
EuXFEL guest, Other
Author group:
Theory
Topic:
Scientific area:
Abstract:
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 singleparticle 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.
Imprint:
SciPost, 2019
Journal Information:
SciPost Physics, 7 (2), 16 (2019)
Related external records:
Language(s):
English


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 Record created 2019-11-26, last modified 2019-11-26

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