Calculus of Sea-Displacement Operators

Details Calculus of Sea-Displacement Operators Calculus of Sea-Displacement Operators

2001-10-11

arxiv.org/abs/cond-mat/0110224v1

Physics

Condensed Matter

Plain LaTeX, 46 tedious pages

Scientific paper

10.1103/PhysRevB.65.165111

Sea-Displacement Operators for fermions are defined in terms of the Fermi fields in a one-component Fermi system. The main conclusions of this article fully corroborate the conjectures made in our earlier works and provide a mathematically rigorous foundations for these works. These ideas are generalised to electron-hole systems where we are able to explore clearly the nature of exciton-exciton interactions. We find that exciton-exciton interactions in an ideal model of GaAs are not adequately treated as simply of the two-body type; rather, the interactions are mediated by the exchange of other bosons that are present in the system. These bosons are identified explicitly and the exciton Green function is calculated. This excercise is also intended to be a precursor to a systematic nonperturbative treatment of gauge theories.

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