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Quadratic Response of the Electron Gas. Inclusion of Local Field Corrections
Author(s) -
Paasch G.,
Heinrich A.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221020130
Subject(s) - quadratic equation , fermi gas , random phase approximation , physics , electron , analogy , quadratic function , local field , function (biology) , field (mathematics) , electronic correlation , mathematics , quantum mechanics , statistical physics , mathematical analysis , condensed matter physics , pure mathematics , linguistics , philosophy , geometry , evolutionary biology , biology
For the description of the static quadratic response of the electron gas several quadratic response functions are defined in analogy to the linear response theory. These response functions can be determined self‐consistently using the known quadratic response function for non‐interacting electrons. Local field corrections describe the influence of exchange and correlation beyond the random phase approximation. They are included in the self‐consistent procedure in the framework of the Hubbard‐Singwi approach.