Credit: Pixabay / CC0 Public domain A journey through time without paradox is theoretically possible, according to the mathematical modeling of a prodigious undergraduate student at the University of Queensland. Germain Tobar, a fourth-year Bachelor of Advanced Science (Honors) student, is studying the possibility of time travel, under the supervision of UQ physicist Dr. Fabio Costa. “Classical dynamics say that if you know the state of a system at any given time, that can tell us the whole history of the system,” Mr. Tobar said. “It has a wide range of applications, allowing us to send rockets to other planets and model the way fluids flow.” For example, if I know the current position and speed of an object falling under the force of gravity, I can calculate where it will be at any time. “However, Einstein’s general theory of relativity predicts the existence of time loops or time travel – where an event can be both in the past and in the future of itself – theoretically turning the study around. dynamics on his head. ” Mr Tobar said that a unified theory that could reconcile both traditional dynamics and Einstein’s theory of relativity was the holy grail of physics. “But current science says the two theories can’t both be true,” he said. “As physicists we want to understand the most fundamental underlying laws of the Universe and for years I have wondered how the science of dynamics can match up with Einstein’s predictions.” I asked myself: “Is time travel mathematically possible?” Mr Tobar and Dr Costa say they have found a way to ‘square the numbers’ and Dr Costa said the calculations could have fascinating consequences for science. Dr Fabio Costa (left) with Germain Tobar, Bachelor of Advanced Science student (with distinction). Credit: Ho Vu “The math checks – and the results are science fiction,” said Dr Costa. “Suppose you have traveled back in time, trying to prevent COVID-19 patient zero from being exposed to the virus.” However, if you were to prevent this individual from getting infected, it would remove the motivation for you to go back and stop the pandemic in the first place. “It’s a paradox – an inconsistency that often leads people to believe that time travel cannot happen in our universe.” Some physicists say it is possible, but logically it is difficult to accept because it would affect our freedom to do any arbitrary action. “It would mean that you can time travel, but you can’t do anything that can cause a paradox.” However, the researchers say their work shows that neither of these conditions need to be the case and that it is possible for events to adjust to be logically consistent with any actions of the time traveler. “In the example of patient zero coronavirus, you could try to prevent patient zero from becoming infected, but in doing so, you would catch the virus and become patient zero, or someone else would,” M said. Tobar. “No matter what you did, the salient events would just recalibrate around you.” It would mean that – whatever your actions – the pandemic would happen, giving your young self the motivation to go back and stop it. “Try as you might to create a paradox, events will always adjust on their own, to avoid any inconsistency.” The range of mathematical processes we have discovered shows that time travel with free will is logically possible in our universe without any paradox. The research is published in Classical and Quantum Gravity. How Einstein could help unravel the mysteries of space travel More information: Germain Tobar et al, Reversible dynamic with closed time-like curves and freedom of choice, Classical and Quantum Gravity ( 2020). DOI: 10.1088 / 1361-6382 / aba4bc Provided by the University of Queensland Citation: Young physicist ‘squares the numbers’ on time travel (2020, September 24) Retrieved September 24, 2020 from https://phys.org / news / 2020-09-young- physicist-squares.html This material is subject to copyright. Other than fair use for private study or research purposes, no part may be reproduced without written permission The content is provided for informational purposes only.
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