Cosmology with higher order gravity.

We present an extension of General Relativity by adding an infinite tower of higher order curvature invariants to the Einstein-Hilbert action. The presence of an inflationary epoch is a natural, almost unavoidable, consequence of this modification. No additional fields besides the metric are required. The period of exponential growth of the scale factor is gracefully connected with standard late-time ΛCDM cosmology. When we rewrite the theory in terms of two energy scales, it is possible to reproduce the late-time acceleration observed in the universe. The evolution is consistent with the acceleration provided by the cosmological constant at low redshift. The full theory remains Einsteinian-like, with Schwarzschild black hole solutions and no extra propagating modes in vacuum.

https://cuaieed-unam.zoom.us/j/82465392677?pwd=aE5vb21VYXdueXNDNVVXMTZlZHhIZz09

Meeting ID: 824 6539 2677
Passcode: 547315