Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-10-27
Phys.Rev. D65 (2002) 045009
Physics
High Energy Physics
High Energy Physics - Theory
27 pages, no figures
Scientific paper
10.1103/PhysRevD.65.045009
We present a simple field transformation which changes the field arguments from the ordinary position-space coordinates to the oblique phase-space coordinates that are linear in position and momentum variables. This is useful in studying quantum field dynamics in the presence of external uniform magnetic field: here, the field transformation serves to separate the dynamics within the given Landau level from that between different Landau levels. We apply this formalism to both nonrelativistic and relativistic field theories. In the large external magnetic field our formalism provides an efficient method for constructing the relevant lower-dimensional effective field theories with the field degrees defined only on the lowest Landau level.
Kim Seok
Lee Choonkyu
Lee Kimyeong
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