If the scale of different universes in the multiverse is large or infinite the theory can’t be tested.”Īlong with being difficult to support, the multiverse theory, which was co-developed by Hawking in 1983, doesn’t jibe with classical physics, namely the contributions of Einstein’s theory of general relativity as they relate to the structure and dynamics of the universe. “But I have never been a fan of the multiverse. “The local laws of physics and chemistry can differ from one pocket universe to another, which together would form a multiverse,” Hertog said in a statement. More recently, the expansion has begun to speed up again as the repulsive effects of dark energy have come to dominate the expansion of the universe. The result would be a multiverse, a collection of bubblelike pockets, each defined by its own laws of physics.ĭiagram of evolution of the (observable part) of the universe from the Big Bang (left) to the present.Īfter the Big Bang and inflation, the expansion of the universe gradually slowed down for the next several billion years, as the matter in the universe pulled on itself via gravity. If you asked an astrophysicist today to describe what happened after the Big Bang, he would likely start with the concept of “cosmic inflation.” Cosmic inflation argues that right after the Big Bang - we’re talking after a teeny fraction of a second - the universe expanded at breakneck speed like dough in an oven.īut this exponential expansion should create, due to quantum mechanics, regions where the universe continues to grow forever and regions where that growth stalls. Instead, the authors argue the Big Bang had a finite boundary, defined by string theory and holograms. The new report, co-authored by Belgian physicist Thomas Hertog, counters the longstanding idea that the universe will expand for eternity. On Wednesday, the Journal of High Energy Physics published the British scientist’s final thoughts on the Big Bang, the leading theory for how the universe began. It turns out he had one more theory left in the locker. Everything besides the force of gravity is made up of open-ended strings.Before he passed away in March, theoretical physicist Stephen Hawking had published more than 230 articles on the birth of the universe, black holes and quantum mechanics. There are two types of strings, open-ended strings, and close-ended strings. Possible to model them into a single equation! Of gravity, nuclear forces, and everything else in the world, it is Is it coming tog ether now? Since strings make up both the force If they vibrate in anotherĬertain way, they become gravitons, which is what causes the force of Tension, they become quarks, for example. These strings vibrate with a certain frequency because of a certain There is a different frequency of wavelength that goes along with it. That when normal strings have a certain 'tension', they vibrate, and Okay, let's go back to physics for a bit. String theory, therefore, is a much less 'violent' theory then the classic Quantum Theory, which means it can fit together with the fragile General Theory of Relativity. Quantum theory only became unstable whenever scientists looked at smaller and smaller areas. Since strings are the smallest possible ingredients of our universe, there is no way to get "deeper". Now the reason why this theory bridges the gap between General Theory of Relativity and the Quantum Theory is this.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |