Scientists have used photons (single particles of light) to simulate quantum particles traveling through time.
Their study, entitled “Experimental simulation of closed timelike curves”, is published in the recent issue of Nature Communications.
The grandfather paradox says that if a time traveler were to return in time, he would unintentionally stop his grandparents from meeting, and, therefore, stop his own birth. But if he had in no way been born, he may never have traveled back in time, to begin with.
The paradoxes are mostly brought about by Einstein’s theory of relativity, as well as the solution to it, the Gödel metric.
The theory of relativity consists of two parts, special relativity and general relativity.
Special relativity posits that time and space are facets of the same thing, referred to as the space-time continuum, and that time could decelerate or accelerate, based on how quickly you are moving, in regard to something else.
Gravity can as well bend time, and Einstein’s theory of general relativity implies that it might be possible to travel backwards in time by following a space-time path, for instance, a shut timeline curve, which goes back to the starting point in space, but reaches an earlier time.
It was forecasted in 1991 that quantum mechanics could evade a few of the paradoxes brought about by Einstein’s theory of relativity as quantum particles act nearly outside the realm of physics.
The researcher’s simulated the conduct of two photons communicating with one another in two distinct cases.
In the first instance, one photon passed through a wormhole after which it interacted with communicated with its older self.
In the second instance, when a photon travels through regular space-time and interacts with another photon, it gets trapped inside a shut timeline curve forever.
Though it has been possible to simulate time travel with small quantum particles, the equivalent may not be possible for bigger atoms or particles that are groups of particles.
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