Year: 2024
Type: article
Abstract: The authors develop here a new representation of two-particle vertices, the effective interaction between quantum particles in a many-body environment. This yields numerical results with much higher accuracy and robustness than previously possible. By avoiding error-prone inversion, their ``symmetric improved estimators'' successfully pass stringent precision tests in both the real- and imaginary-frequency frameworks of quantum field theory. This scheme allows field-theoretic methods for strongly correlated electrons to expand into the real-frequency direction.
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, Simons Foundation, International Max Planck Research School for Environmental, Cellular and Molecular Microbiology, Flatiron Health, National Research Foundation, Deutsche Forschungsgemeinschaft, Seoul National University, National Research Foundation of Korea, Institute for Basic Science, International Max Planck Research School for Advanced Methods in Process and Systems Engineering, Ministry of Science and ICT, South Korea, Gauss Centre for Supercomputing, International Max Planck Research School for Quantum Science and Technology, Leibniz-Gemeinschaft, Leibniz-Rechenzentrum
Awards: G1768993395, G4423736403, G5487867785, G6439590540, G6673824303, G6825954930, G723530016, RealFrequenz VierPunktKorrelationsfunktionen zur Untersuchung von inelastischen und nichtlokalen Effekten in stark korrelierten Systemen, Kavli Institute for Theoretical Physics, EXC 2111: Munich Center for Quantum Science and Technology (MCQST)
OpenAlex ID: W4393038794