Abstract
We introduce a calculus over a lattice based on a lattice generalization of the Clifford algebras. We show that Clifford algebras, in contrast to the continuum, are not an adequated algebraic structure for lattice problems. Then we introduce a new algebraic structure, that reduces to a Clifford algebra in the continuum limit, in terms of which we can develop a formalism analogous to the differential geometry of the continuum, also in the sense that we have intrinsic expressions. The differential operator is given by the graded commutator of an operator that generalizes the Dirac operator. We also discuss the applications of this formalism in lattice gauge theories, with particular attention to the fermion doubling problem.
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On leave of absence from Department of Applied Mathematics, State University at Campinas (UNICAMP), 13081-970 Campinas, SP, Brazil — vaz@ime.unicamp.br
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Vaz, J. Clifford-like calculus over lattices. AACA 7, 37–70 (1997). https://doi.org/10.1007/BF03041215
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DOI: https://doi.org/10.1007/BF03041215