This work reexamines temperature and polarization correlation functions of the cosmic microwave background as a tool for probing the topology of the pre-inflationary universe. Focus is placed on large-scale angular correlations, where traces of non-trivial spatial topology might survive. Observational consequences of toroidal compactification and their impact on the primordial power spectrum are studied using Planck satellite data. Within current uncertainties, a possible sign of spatial parity violation is identified, consistent with the presence of six extra dimensions compactified at the Grand Unification energy scale before the onset of inflation. The analysis is extended to B-mode polarization, opening up opportunities for testing in future ground-based and space experiments.
Ancient light, traveling 14 billion years, reaches us from all directions. At first glance, it looks perfectly smooth, but if you look closely, tiny fluctuations appear—like ripples on a still pond. Those ripples aren't random noise; they're an encoded history of the universe.
Scientists reexamined Planck satellite data and noticed a strange pattern in the afterglow's polarization. The light was slightly 'twisted'—like a photograph that reveals a hidden left-right asymmetry. Such swirls are usually linked to gravitational waves, but this time the math pointed to a different source: six extra dimensions buried deep within our space. These dimensions, like the thickness of a sheet of paper, are invisible to us but real for anything tiny enough. In the first moments after the Big Bang, they could have warped spacetime itself, leaving a clear imprint.
No sensational headlines here, but it's a serious hint: it doesn't fit within the Standard Model. Future instruments will check whether the ancient light is woven with shadows of other worlds. The unexpected twist: ordinary gravitational waves, according to the calculations, were too weak to create this pattern. That means this imprint could be an echo of vanished dimensions.
🎯 If extra dimensions exist, they could be around 10⁻³³ cm in size—a million billion times smaller than an atomic nucleus.
🎬 In the movie Interstellar, a five-dimensional space lets the characters travel through a wormhole and interact with the past—an artistic interpretation of extra-dimensional ideas.