<p>This paper is a follow-up on the <i>Noncommutative Differential Geometry on Infinitesimal Spaces</i> [<CitationRef CitationID="CR16">16</CitationRef>]. In the present work, we extend the algebraic convergence established in [<CitationRef CitationID="CR16">16</CitationRef>] to the Riemannian geometric setting. On the one hand, we reformulate the definition of finite dimensional compatible Dirac operators using Clifford algebras. This definition also leads to a new construction of a Laplace operator. On the other hand, after choosing a family of Green functions to define the coefficients of the Dirac matrices, we show that these matrices can be interpreted as stochastic matrices. The sequence of operators <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\((D_n)_{n\in \mathbb {N}}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mo stretchy="false">(</mo> <msub> <mi>D</mi> <mi>n</mi> </msub> <mo stretchy="false">)</mo> </mrow> <mrow> <mi>n</mi> <mo>∈</mo> <mi mathvariant="double-struck">N</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> converges then in average to the local expression of the classical Dirac operator on an oriented compact Riemann manifold. The same result is drawn for the Laplace operator.</p>

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Statistical fluctuation of infinitesimal spaces

  • Damien Tageddine,
  • Jean-Christophe Nave

摘要

This paper is a follow-up on the Noncommutative Differential Geometry on Infinitesimal Spaces [16]. In the present work, we extend the algebraic convergence established in [16] to the Riemannian geometric setting. On the one hand, we reformulate the definition of finite dimensional compatible Dirac operators using Clifford algebras. This definition also leads to a new construction of a Laplace operator. On the other hand, after choosing a family of Green functions to define the coefficients of the Dirac matrices, we show that these matrices can be interpreted as stochastic matrices. The sequence of operators \((D_n)_{n\in \mathbb {N}}\) ( D n ) n N converges then in average to the local expression of the classical Dirac operator on an oriented compact Riemann manifold. The same result is drawn for the Laplace operator.