Gravity with Higher Derivatives in D-Dimensions

Arkadiy Popov; P. M. Petryakova; Sergey G. Rubin

Gravity with Higher Derivatives in D-Dimensions

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arxiv 2011.03848 v1 pith:YMFCOI2Q submitted 2020-11-07 gr-qc hep-th

Sergey G. Rubin , Arkadiy Popov , P. M. Petryakova This is my paper

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The aim of this review is to discuss the ways to obtain results based on gravity with higher derivatives in D-dimensional world. We considered the following ways: (1) reduction to scalar tensor gravity, (2) direct solution of the equations of motion, (3) derivation of approximate equations in the presence of a small parameter in the system, and (4) the method of test functions. Some applications are presented to illustrate each method. The unification of two necessary elements of a future theory is also kept in mind - the extra dimensions and the extended form of the gravity.

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gr-qc 2026-01 reject novelty 4.0 of 10

The direction of time is claimed to be fixed by the exponentially growing entropy of expanding extra dimensions, which dominates every other entropy source in the universe.

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