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The time-traveler hypothesis is considered pseudoscientific. [citation needed] American astrophysicist Neil deGrasse Tyson has referred to the hypothesis as illogic. [48] [49] UFO skeptic Robert Sheaffer criticized Masters' work because it relies on "the belief that time travel is not only possible, but real." [2]
Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine was popularized by H. G. Wells's 1895 novel The Time ...
Theoretically, scientists say time travel is possible. The challenging part is recreating time travel in real life.
The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time. [1] [2] [3] [4]
A possible resolution to the paradoxes resulting from wormhole-enabled time travel rests on the many-worlds interpretation of quantum mechanics. In 1991 David Deutsch showed that quantum theory is fully consistent (in the sense that the so-called density matrix can be made free of discontinuities) in spacetimes with closed timelike curves. [ 57 ]
In other words, any travel that is faster-than-light will be seen as traveling backwards in time in some other, equally valid, frames of reference, [39] or need to assume the speculative hypothesis of possible Lorentz violations at a presently unobserved scale (for instance the Planck scale).
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