Large-extra-dimension models lower the fundamental higher-dimensional gravitational scale while obtaining a large four-dimensional reduced Planck mass from compact volume . Ordinary matter can be localized on a brane while gravity propagates in the bulk. The Planck mass from compactification volume relation explains weak effective four-dimensional gravity but leaves volume stabilization and the origin of a large internal volume as separate problems.
// Target: physics.bigb
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Large extra dimensions (LED) is a theoretical concept in physics that suggests the existence of additional spatial dimensions beyond the familiar three (length, width, height). These extra dimensions are proposed to be "large" in the sense that their size can be on the order of millimeters or more, in contrast to traditional extra dimensions predicted by string theory, which are typically compactified and very small, on the order of the Planck length (around \(10^{-35}\) meters).