Einstein-Cartan Theory

Einstein-Cartan Theory extends Einstein's General Relativity by incorporating the intrinsic spin of particles, like electrons, into the fabric of spacetime. Unlike traditional gravity, which accounts for mass and energy shaping spacetime, this theory also considers how spin causes spacetime to twist or "torsion." This torsion is very small and typically negligible under normal conditions but may become significant in extreme environments, such as inside black holes or the early universe. Overall, the theory provides a more complete picture of how matter and spacetime interact, enriching our understanding of the universe's fundamental structure.