Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-02-22
J.Phys. G26 (2000) L17-L21
Physics
High Energy Physics
High Energy Physics - Theory
REVTeX, 7 pages, no figure
Scientific paper
10.1088/0954-3899/26/2/101
In 2+1 dimensions there exists a duality between a charged Dirac particle coupled minimally to a background vector potential and a neutral one coupled nonminimally to a background electromagnetic field strength. A constant uniform background electric current induces in the vacuum of the neutral particle a fermion current which is proportional to the background one. A background electromagnetic plane wave induces no current in the vacuum. For constant but nonuniform background electric charge, known results for charged particles can be translated to give the induced fermion number. Some new examples with infinite background electric charge are presented. The induced spin and total angular momentum are also discussed.
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