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Phase of the fermion determinant in QED_3 using a gauge invariant lattice regularization
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We use canonical formalism to study the fermion determinant in different three dimensional abelian gauge field backgrounds that contain non-zero magnetic and electric flux in order to understand the non-perturbative contributions to the parity-odd and parity-even parts of the phase. We show that a certain phase associated with free fermion propagation along a closed path in a momentum torus is responsible for the parity anomaly in a background with non-zero electric flux. We consider perturbations around backgrounds with non-zero magnetic flux to understand the structure of the parity-breaking perturbative term at finite temperature and mass.
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Cited by 1 Pith paper
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From Dirac Cones to Semions: An Exact Finite-Size Theory of Parity-Anomaly Transport in Chiral Spin Liquids
The parity-odd cylinder determinant of a gapped Dirac cone fixes ν_s = C/2 and K_em = 2C for semion CSLs, with strictly exponential finite-size corrections, confirmed on kagome at three levels.
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