Abstract
A method for renormalization of the Casimir energy of confined fermion fields in (1+1)D is proposed. It is based on the extraction of singularities which appear as poles at the point of physical value of the regularization parameter, and subsequent compensation of them by means of redefinition of the “bare” constants. A finite ground state energy of the two-phase hybrid fermion bag model with chiral boson–fermion interaction is calculated as the function of the bag's size.
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