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Formation and Decay of Coherent Four‐Particle Correlations in Semiconductors: A Green's Function Theory
Author(s) -
Schäfer W.,
Lövenich R.,
Fromer N.,
Chemla D.S.
Publication year - 2000
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 - 10.1002/1521-3951(200009)221:1<195::aid-pssb195>3.0.co;2-e
Subject(s) - dephasing , physics , rotation formalisms in three dimensions , semiconductor , particle (ecology) , distribution function , truncation (statistics) , statistical physics , field (mathematics) , function (biology) , excited state , quantum mechanics , computational physics , mathematics , statistics , geometry , pure mathematics , oceanography , evolutionary biology , biology , geology
Recent conceptual advances in the theory of physics of highly excited semiconductors are based on two formalisms, the real‐time non‐equilibrium Green's function techniques and the coherently controlled truncation of the many‐particle problems. These approaches apply to completely different but complementary experimental conditions. We present a novel many‐particle theory, which contains both of these methods as limiting cases. As a first example of its application, we investigate four‐particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one‐particle distribution functions. Our results are the first numerical rigorous solutions of the four‐particle problem in a semiconductor. They are in excellent agreement with experimental data.