Energy density fluctuations may support cyclic model from "summary" of Endless Universe by Paul J. Steinhardt,Neil Turok
Energy density fluctuations, which are tiny differences in the amount of energy present in different regions of space, could play a crucial role in supporting the cyclic model of the universe. These fluctuations arise from quantum uncertainty, which is a fundamental aspect of nature at the smallest scales. In the context of the cyclic model, these fluctuations can lead to the creation of new universes within a larger multiverse. The cyclic model proposes that our universe goes through an endless cycle of expansion and contraction, with each cycle giving rise to a new universe. During the contraction phase, the energy density fluctuations could become amplified, creating conditions that favor the formation of a new universe. This process could explain how a new universe could be born from the remnants of the previous one, setting the stage for another cycle of expansion and contraction. The key idea here is that energy density fluctuations provide a mechanism for the universe to perpetually renew itself, ensuring that the cycle of creation and destruction can continue indefinitely. Without these fluctuations, the cyclic model would lack a fundamental mechanism for generating new universes, leading to a universe that eventually runs out of steam. By incorporating energy density fluctuations into the cyclic model, the concept gains a level of self-sustaining dynamism that aligns with our current understanding of the universe's behavior at the quantum level. This approach bridges the gap between the macroscopic scale of the universe and the microscopic realm of quantum mechanics, providing a more comprehensive and coherent picture of how our universe may operate on a cosmic scale.- The idea that energy density fluctuations may support the cyclic model represents a fascinating intersection of quantum physics and cosmology. It highlights the interconnectedness of different scales of the universe and offers a compelling framework for understanding the cyclical nature of existence in a vast and ever-evolving cosmos.
