Induced quantum numbers of a magnetic vortex at nonzero temperature

Details Induced quantum numbers of a magnetic vortex at nonzero temperature Induced quantum numbers of a magnetic vortex at nonzero temperature

2004-10-08

arxiv.org/abs/hep-th/0410091v4

Nucl.Phys. B714 (2005) 217-255

Physics

High Energy Physics

High Energy Physics - Theory

40 pages, 7 figures, journal version, minor corrections

Scientific paper

10.1016/j.nuclphysb.2005.01.040

The phenomenon of the finite-temperature induced quantum numbers in fermionic systems with topological defects is analyzed. We consider an ideal gas of twodimensional relativistic massive electrons in the background of a defect in the form of a pointlike magnetic vortex with arbitrary flux. This system is found to acquire, in addition to fermion number, also orbital angular momentum, spin, and induced magnetic flux, and we determine the functional dependence of the appropriate thermal averages and correlations on the temperature, the vortex flux, and the continuous parameter of the boundary condition at the location of the defect. We find that nonnegativeness of thermal quadratic fluctuations imposes a restriction on the admissible range of values of the boundary parameter. The long-standing problem of the adequate definition of total angular momentum for the system considered is resolved.

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