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Updated: Mar 18, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Departures from the Friedmann-Lemaitre-Robertston-Walker Cosmological Model in an Inhomogeneous Universe: A Numerical
John T Giblin1,2, James B Mertens2, Glenn D Starkman2
1Department of Physics, Kenyon College, 201 North College Rd, Gambier, Ohio 43022, USA.
Abstract:
While the use of numerical general relativity for modeling astrophysical phenomena and compact objects is commonplace, the application to cosmological scenarios is only just beginning. Here, we examine the expansion of a spacetime using the Baumgarte-Shapiro-Shibata-Nakamura formalism of numerical relativity in synchronous gauge. This work represents the first numerical cosmological study that is fully relativistic, nonlinear, and without symmetry. The universe that emerges exhibits an average Friedmann-Lemaître-Robertson-Walker (FLRW) behavior; however, this universe also exhibits locally inhomogeneous expansion beyond that expected in linear perturbation theory around a FLRW background.
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