Seeing is more than believing: Holography helps our understanding of our early universe. A team of researchers at Kyoto University is exploring the use of higher dimensions in de Sitter space to explain gravity in the early universe. By developing a method to compute correlation functions among flu
Conceptual diagram of the calculation of density fluctuation correlations in the early universe based on a low-dimensional matter field theory using holography. Credit: KyotoU/Yasuaki HikidaA team of researchers at Kyoto University is exploring the use of higher dimensions in de Sitter space to explain gravity in the early universe.
An approach known as superstring theory could use another dimension to help bridge Einstein’s theory with quantum mechanics, solving many of these problems. But the necessary evidence to support this proposal has been lacking.to invoke a higher dimension to explain gravity in the expanding early universe. They have developed a concrete method to compute correlation functions among fluctuations on expanding universe by making use of holography.
Starting with existing methods for handling gravity in anti-de Sitter space, Hikida’s team reshaped them to work in expanding de Sitter space to more precisely account for what is already known about the universe.
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