Modified gravity from the nonperturbative quantization of a metric

The European Physical Journal C, 2015

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DOI 10.1140/epjc/s10052-015-3398-5
Data confidence 85 high
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Abstract

Based on certain assumptions for the expectation value of a product of the quantum fluctuating metric at two points, the gravitational and scalar field Lagrangians are evaluated. Assuming a vanishing expectation value of the first-order terms of the metric, the calculations are performed with an accuracy of second order. It is shown that such quantum corrections give rise to modified gravity.