My blog topic

 This term, I will be researching and writing about most interesting and/or scary theories, mainly but not only concerning the whole universe and our existence.

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False vacuum theory

The false vacuum theory originates from quantum field theory, in which a false vacuum is a vacuum that is in a stable state but isn’t permanently stable: it is metastable. This false vacuum could at any moment decay to a permanently stable vacuum. The false vacuum theory states that our universe is currently in the false vacuum, which may at any time revert to a stable state. This would cause the true vacuum to form and expand rapidly at a speed of light, which would prompt colossal changes to our universe: the laws of physics would be rewritten anew and the basic structure of matter would change completely. In 1980 another theory was proposed, stating that in a case of a true vacuum rapidly forming, our universe would simply revert to its state before the Big Bang, and simply be deleted, as if it never existed. Links: https://cosmosmagazine.com/science/physics/vacuum-decay-the-ultimate-catastrophe/
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Quantum immortality

Quantum immortality theory comes from a thought experiment published in 1987 by Hans Moravec and in 1988 by Bruno Marchal. The experiment proposes the same setup as the famous Schrödinger’s Cat experiment, with the change that you are both the subject and the observer. In the Schr ö dinger’s experiment, after putting the cat in the box, it is in a state of superposition – both dead and alive at the same time. So, after being put and closed in a box, you two have to be in a superposition. Now we have to assume, that there are infinite universes, meaning that every possible world, past, present and future will always exist on a quantum level, with which the quantum physics generally agree. After running the experiment on time and letting some highly lethal gas or a radioactive material in the box, in an infinite amount of universes you will die, and in an infinite number of universes you will live. After rerunning the experiment the same happens – you die in an infinite number of uni...
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Alcubierre drive

Alcubierre drive, more widely known as warp drive, is yet another scientific concept originating from Einstein’s theory of relativity. Its purpose would be to allow travel faster than light for any object equipped with such technology. Its name comes from scientist Miguel Alcubierre, who published a paper, explaining how such theoretical warp drive could work. It is well known that no known object is capable of travelling faster than the speed of light. This is bypassed by forming a warped bubble of space around the object, essentially forming a separate “universe”, in which travel faster than light is possible. The only problem is that in order to form this bubble you would need a large quantity of a material with negative mass, and all known matter has positive mass. Existence of such matter would violate more than one energy conditions, hence why even Alcubierre himself said that unless such matter is discovered and able to be artificially created, warp drive is highly unlikely to...
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