Abstract
The analysis of the measurement of gravitational fields leads to the Rosenfeld inequalities. They say that, as an implication of the equivalence of the inertial and passive gravitational masses of the test body, the metric cannot be attributed to an operator that is defined in the frame of a local canonical quantum field theory. This is true for any theory containing a metric, independently of the geometric framework under consideration and the way one introduces the metric in it. Thus, to establish a local quantum field theory of gravity one has to transit to non-Riemann geometry that contains (beside or instead of the metric) other geometric quantities. From this view, we discuss a Riemann–Cartan and an affine model of gravity and show them to be promising candidates of a theory of canonical quantum gravity.
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Borzeszkowski, HH.v., Datta, B.K., de Sabbata, V. et al. Local and Non-Local Aspects of Quantum Gravity. Foundations of Physics 32, 1701–1716 (2002). https://doi.org/10.1023/A:1021498622495
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DOI: https://doi.org/10.1023/A:1021498622495