Can Time Travel Survive a Theory of Everything Analysis

Last Updated: 14 Aug 2020
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The article, “Can Time Travel Survive a Theory of Everything,” was written by Tom Siegfried, a contributing correspondent. 2019. Einstein's Special Theory of Relativity allows for some form of time dilation which would usually be considered as time travel. Through physics, the idea of time travel was used to explore the implications of physical theories such as gravity, general relativity, and quantum mechanics.

Time travel is highly challenging at the very least, but not necessarily impossible. Under Einstein's general theory of relativity, gravity can bend over time. The space-time bending allows objects to travel along a curved path, and that space curvature is known as gravity.

Time travel is the idea of movement between certain points in time, analogous to movement by an entity or an individual between various points in space, usually using a hypothetical system known as a time machine, such as TARDIS (Time And Relative Dimension In Space) that appears in the British science fiction television series, ”Doctor Who”. A time machine in physics is known as a closed timelike curve (CTC). Objects can pass through time and space but they can never travel faster than light through space. Any path of the spacetime that obeys this law is known as a timelike curve.

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Time loops in general relativity should be impossible for time travel, even if they are possible as this may only occur under certain conditions. Kurt Gödel was Austrian logician, mathematician and analytic philosopher that was born in Austro-Hungary. Considered to be one of the most important logicians in history along with Aristotle and Gottlob Frege, Gödel had an enormous influence on science and philosophical thought in the 20th century.

In the 1940s, Kurt Gödel showed that the cosmos will have to rotate, not expand. Yet the world is expanding, and certainly not spinning, so the chances of revisiting the previous time are dampened. Even if those paths existed, it would cost too much to build a ship to navigate them. However, even if it is only conceivable in theory, the theoretical implications for the universe's fundamental physics might make it worth the time required to investigate it.

The first step will be tried to decide exactly what the applicable physics laws are indeed. This coexists uncomfortably with the quantum mechanics that rule the subatomic environment, and probably since it is made of subatomic material including the universe. Time travel will rely on what the ultimate right theory incorporates which are quantum and general relativity.

Therefore, several candidate theories for combining general relativity and quantum mechanics into a single theory have been developed. For instance, Christian Wüthrich who is an associate professor of philosophy in the Department of Philosophy at the University of Geneva. Commonly, he works mainly in physics theory, which is intruding heavily into metaphysics and scientific general theory. His primary research is on space and time, time travel, continuity, identity, natural rules, determinism and causation.

Just like what he wrote on the research paper, it is possible to experience time travel as it would accept the prospect of time travel on some other, less fundamental, scale although the fundamental theory would then remain unapproachable to the time travel itself. It is also depending on the relationship between the basic theory and the evolving spacetime. For quantum gravity theory approach or known as causal set theory, it involves the ordering of sets of events in a proper cause-and-effect relation and other common method, known as quantum loop gravity, envisages the space to be formed of fundamental loops but it faced technical difficulties to work time into the picture with space.

Yet, he said that study of the specifics at this point of the creation of the loop quantum gravity does not give much reason for optimism. The finding of time travel cannot be decided as master theory (M-theory) does not exist yet. Therefore, the dissimilar display from M-theory indicates to create the multiple version of string as in the string theory said that all matter was composed of tiny snippets or strings of energy that vibrated. But, investigations of assorted string theory scenarios do suggest that the final word theory would, indeed, naturally incorporate closed timelike curves.

Closed timelike curves in string theory might not only be allowed, but they might be everywhere. The assumption that time travel loops occur may be taken as proof against the theory as there is nothing that can ensure they will be retained in the evolving large-scale spacetime which is applicable to real life. A more principal hypothesis can concede structures measuring to closed timelike curves and hence allow time travel.

In conclusion, there are still a lot of things we do not know about the nature of our Universe and realize that we are still not fully understood about all theories of quantum gravity. Time travel can provide lots of new information and knowledge about the implication of physical theories that occur whether in the past or in the future. Nevertheless, it may take a long time to prove and get it how quantum gravity theories relate to common relativity theory and plus it will cost a lot too. But we must remember that in order to achieve something, nothing is impossible.

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