Anomaly-induced magnetic screening in (2+1) dimensional QED at finite density.

Comment on "Anomaly-induced magnetic screening in (2+1)-dimensional QED at finite density"

Dynamical Generation of Fermion Mass and Magnetic Field in Three-Dimensional QED with Chern-Simons Term

We study dynamical symmetry breaking in three-dimensional QED with a Chern-Simons (CS) term, considering the screening effect ofN flavor fermions. We find a new phase of the vacuum, in which both the fermion mass and a magnetic field are dynamically generated, when the coefficient of the CS term κ equals Ne/4π. The resultant vacuum becomes the finite-density state halffilled by fermions. For κ ...

Axial anomaly of QED in a strong magnetic field and noncommutative anomaly

The Adler-Bell-Jackiw (ABJ) anomaly of a 3 + 1 dimensional QED is calculated in the presence of a strong magnetic field. It is shown that in the regime with the lowest Landau level (LLL) dominance a dimensional reduction from D = 4 to D = 2 dimensions occurs in the longitudinal sector of the low energy effective field theory. In the chiral limit, the resulting anomaly is therefore comparable wi...

Chiral limit of the two-dimensional fermionic determinant in a general magnetic field

We consider the effective action for massive two-dimensional QED in flat Euclidean space-time in the background of a general square-integrable magnetic field with finite range. It is shown that its small mass limit is controlled by the chiral anomaly. New results for the low-energy scattering of electrons in 2+1 dimensions in static, inhomogenous magnetic fields are also presented. PACS numbers...

hep-th/9802101 DPNU-97-53 Dynamical Generation of Fermion Mass and Magnetic Field in Three-Dimensional QED with Chern-Simons Term

We study dynamical symmetry breaking in three-dimensional QED with a Chern-Simons (CS) term, considering the screening e ect ofN avor fermions. We nd a new phase of the vacuum, in which both the fermion mass and a magnetic eld are dynamically generated, when the coe cient of the CS term equals Ne=4 . The resultant vacuum becomes the nite-density state halflled by fermions. For = Ne=2 , we nd th...