A joint research group led by Professor Takahiro Tanaka (Kyoto University) and Associate Professor Yuko Urakawa (KEK, and Designated Associate Professor at KMI) has applied the “split universe approach,” in which the universe is recomposed into a coarse-grained mosaic art, to greatly simplify numerical calculations of primordial gravitational waves.

This approach enables the numerical calculation of various models of the universe, including those that have been difficult to analyze due to the complex numerical calculations required. It is expected to lead to the elucidation of the universe immediately after its creation through gravitational wave observations. Additionally, they demonstrated that this method is useful for intuitively understanding the generation mechanism of primordial gravitational waves.

For more information, please see the press release from Nagoya University.