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Math proves paradox-free time travel



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  • Time travel is deterministic and locally free, says a new newspaper – the solution to an age-old paradox.
  • This follows recent research which found that the present is not altered by a time traveling qubit.
  • It’s still not very nice to step on butterflies.

    A senior honors the bachelor’s degree in a new peer-reviewed article says he’s proven mathematically the physical feasibility of a certain type of time travel. The paper appears in Classical and quantum gravity.

    University of Queensland student Germain Tobar, whom the university press release describes as “amazing,” worked with UQ physics professor Fabio Costa this paper. In the “Reversible dynamics with closed time curves and freedom of choiceTobar and Costa say they struck a middle ground in math that solves a great logical paradox in a model of time travel. Let’s dive in.

    The math itself is complex, but it boils down to something pretty simple. The time travel discussion focuses on closed time-like curves (CTCs), which Albert Einstein first postulated. And Tobar and Costa say that as long as only two parts of an entire scenario within a CTC are still in “causal order” when exiting, the rest is subject to local free will.

    “Our results show that CTCs are compatible not only with determinism and the local ‘free choice’ of operations, but also with a wide variety of scenarios and dynamic processes,” the paper concludes.

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    In a university statement, Costa illustrates science with an analogy:

    “Suppose you traveled in time to prevent patient zero from COVID-19 from being exposed to the virus. However, if you were to prevent that person from getting infected it would remove the motivation for you to go back and stop the pandemic in the first place. This is a paradox, an inconsistency that often leads people to believe that time travel cannot take place in our universe. [L]From a logical point of view, it is difficult to accept as it would affect our freedom to take arbitrary action. It would mean you can time travel, but there is nothing you can do that would create a paradox. ”

    Some of the results of this are summarized as the “butterfly effect” which refers to unintended large consequences of small actions. But the real truth about the math results is more like another classic parable: the monkey’s paw. Be careful what you want and be careful what you time travel for. Tobar explains in the declaration:

    “In the Coronavirus Patient Zero example, you could try to prevent Patient Zero from becoming infected, but that way you would catch the virus and become Patient Zero, or someone else would. No matter what you did, the salient events would only recalibrate around you. Try to create a paradox, events always adapt to avoid inconsistencies. “

    While that sounds frustrating to the person trying to prevent a pandemic or kill Hitler, for mathematicians it helps smooth out a fundamental speed boost in the way we think about time. It also goes with newer ones Quantum Findings from Los Alamosfor example and the way Random Walk Math behave in one and two dimensions.

    At the very least, this research suggests that anyone who at some point finds a way to meaningfully travel in time can do so and experiment without the fear of ruining the world – at least not immediately.

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