CANTATA Members Awarded by the Gravity Research Foundation

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26 April, 2019
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CANTATA Members Awarded by the Gravity Research Foundation

David Benisty (left) and Eduardo Guendelman.

A paper by ECI David Benisty and Prof. Eduardo Guendelmanā€‹, both members of the CANTATA COST Action, has been awarded 2nd prize in Gravity Research Foundation essay competition of this year 2020.

The main purpose of the Foundation is to encourage scientific research and to arrive at a more complete understanding of the phenomenon of gravitation. The Foundation encourages such research through its annual awards for essays on gravitation with the expectation that beneficial uses will ensue.

The subject of the paper, entitled “Lorentzian Quintessential Inflation” is the construction of a model of the universe from its very early state to its present state. It is known that the universe has been expanding for a long time. The accelerated expansion of the late universe is explained by a very small “vacuum energy”. However, in order to explain the homogeneity of the radiation from the big bang (the Cosmic Microwave Background radiation), researchers believe that the universe expands from very large vacuum energy briefly before the big bang. This theory called “the cosmic inflation” was invented originally by Prof. Eduardo Guendelman’s supervisor ā€“ Prof. Alan Guth, when Guendelman was a Ph.D. student at MIT. It seems that both vacuum energies have some similar features, but with huge different rates.

The paper contributes to formulating a simple model of the whole story of the universe as the evolution of a single field – interpolating regions of high vacuum energy in the early universe and lower vacuum energy in the late universe. The big discrepancy between the early vacuum energy and the late one appears naturally in the model.

This work adds further new insight on how the dynamics of the universe at the shortest and largest scales can be connected, thus representing a step forward in the goals of the CANTATA COST Action.

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