Topos-theoretic Relativization of Physical Representability and Quantum Gravity

Details Topos-theoretic Relativization of Physical Representability and Quantum Gravity Topos-theoretic Relativization of Physical Representability and Quantum Gravity

2006-10-24

arxiv.org/abs/gr-qc/0610113v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

36 pages, replaced by expanded version

Scientific paper

In the current debate referring to the construction of a tenable background independent theory of Quantum Gravity we introduce the notion of topos-theoretic relativization of physical representability and demonstrate its relevance concerning the merging of General Relativity and Quantum Theory. For this purpose we show explicitly that the dynamical mechanism of physical fields can be constructed by purely algebraic means, in terms of connection inducing functors and their associated curvatures, independently of any background substratum. The application of this mechanism in General Relativity is constrained by the absolute representability of the theory in the field of real numbers. The relativization of physical representability inside operationally selected topoi of sheaves forces an appropriate interpretation of the mechanism of connection functors in terms of a generalized differential geometric dynamics of the corresponding fields in the regime of these topoi. In particular, the relativization inside the topos of sheaves over commutative algebraic contexts makes possible the formulation of quantum gravitational dynamics by suitably adapting the functorial mechanism of connections inside that topos.

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