Abstract
Having in mind the development of a technical tool to treat fermionic systems, we propose a Kadanoff-Wilson block renormalization transformation employing unusual averages (an inevitable artifact due to the specificity of lattice fermions and to the desired transformation properties). The free propagator is decomposed into operators associated to different momentum scales and with orthogonal relations, and the effective actions generated from the Dirac operator by the transformations present uniform exponential decay. We argue to show the usefulness of the formalism to study correlation functions of interacting fermions.
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References
K. Gawedzki and A. Kupiainen, Block spin renormalization group for dipole gas and (∇φ)4,Ann. Phys. 147:198–243 (1983).
G. Benfatto and G. Gallavotti, Perturbation theory of the Fermi surface in a quantum liquid,J. Stat. Phys. 59(3/4):541–664 (1990).
E. Pereira and M. O'Carroll, Orthogonality between scales and wavelets in a representation for correlation functions. The lattice dipole gas and (∇φ)4 models,J. Stat. Phys. 73(3/4):695–721 (1993).
M. O'Carroll and E. Pereira, A representation for the generating and correlation functions in the block field renormalization group formalism and asymptotic freedom,Ann. Phys. 218:139–159 (1992).
T. Balaban, M. O'Carroll, and R. Schor, Block renormalization group for Euclidean fermions,Commun. Math. Phys. 122:233–247 (1989).
A. C. D. Van Enter, R. Fernandez and A. D. Sokal, Renormalization transformations in the vicinity of first-order phase transitions: What can and cannot go wrong,Phys. Rev. Lett. 66:3253–3256 (1991).
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Pereira, E. Orthogonality between scales in a renormalization group for fermions. J Stat Phys 78, 1067–1082 (1995). https://doi.org/10.1007/BF02183702
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DOI: https://doi.org/10.1007/BF02183702