It is of particular interest to note that for the open case in this scenario, after the inflationary epoch, the universe enters a coasting evolution
a ∝ t and continues to expand in this fashion. The spontaneous creation of the coasting universe obtained in the present paper from nothing is an attractive problem worth pursuing.
After the inflationary era? Pretty sure that would run afoul of primordial nucleosynthesis observations.Garth said:A paper published in 'Gravitation and Cosmology', [21, 208 (2015)] and on today's physics ArXiv claims to have found a solution to the Wheeler-DeWitt equation that exactly corresponds to the classical evolution of a Friedmann model with appropriate matter/energy density: Exact Classical Correspondence in Quantum Cosmology, interestingly it states:
Garth
Yes, he doesn't look at the CMB - or nucleosynthesis for that matter - perhaps there is work to be done on this model!Chalnoth said:After the inflationary era? Pretty sure that would run afoul of primordial nucleosynthesis observations.
Hi Alex and welcome to these Forums!Alex Kostko said:If the time was NOW and THEN, could it be true that LHC's primordial soup is the one that was in the beginning? What if we are in the beginning and the end?
Exact Classical Correspondence in Quantum Cosmology is the idea that the laws of classical physics, such as Newton's laws, should emerge from the fundamental principles of quantum mechanics in the context of cosmology. This means that in certain regions of the universe, where quantum effects are negligible, the behavior of matter and energy should follow classical laws.
Exact Classical Correspondence is of particular interest in the study of the early universe. This is because at the beginning of the universe, quantum effects were dominant, and as the universe expanded and cooled, these effects gradually became less significant. Therefore, understanding how classical physics emerges from quantum mechanics can help explain the behavior of the early universe.
One of the main challenges in achieving Exact Classical Correspondence is the lack of a complete theory of quantum gravity. While we have successful theories of quantum mechanics and classical physics, there is currently no unified theory that can accurately describe both at the same time. This makes it difficult to understand how classical physics can emerge from quantum mechanics in the context of cosmology.
Exact Classical Correspondence can be tested and validated through experiments and observations. By comparing the predictions of classical physics with the behavior of matter and energy in regions of the universe where quantum effects are negligible, we can see if they align. Additionally, theoretical models and simulations can also be used to test the concept of Exact Classical Correspondence.
Exact Classical Correspondence has potential applications in various fields, such as cosmology, astrophysics, and quantum computing. By understanding how classical physics emerges from quantum mechanics, we can gain a better understanding of the fundamental laws of the universe and potentially develop new technologies based on quantum principles.