According to the well-known paradox of the murdered grandfather, the impossibility of time travel is explained by the fact that, returning to the past, the traveler can prevent the meeting of his grandparents, and thereby prevent his own birth.
However, some researchers believe otherwise. Scientists have succeeded for the first time in simulating the quantum-level interaction of two photons during time travel. This study may be the first evidence that jumping through time is possible.
The research was carried out by a team of scientists from the University of Queensland in Australia and the results are published in the journal Nature Communications. The study used photons - the simplest particles of light - to simulate quantum particles sent back in time.
By studying their behavior, scientists have identified possible bizarre aspects of modern physics. In simulations, the researchers examined two possible outcomes for a photon in time travel.
According to the first, "photon one" will travel through the throat of a wormhole - a hypothetical topological feature of space-time, which at every moment of time is a "tunnel" in space - into the past and will interact with its version from the past, according to the British Internet in the latest issue -publishing Mail Online.
According to the second, "photon two" exits normal space-time, but interacts with a photon that is stuck in the throat of a wormhole, known as a closed time curve.
Simulating the behavior of photon two allowed us to study the behavior of photon one and, as the results showed, time travel is possible, at least at the quantum level.
By definition, "quantum" refers to the smallest possible particles that can exist independently of each other, such as photons. However, it is still difficult to judge whether this proves that the results of this simulation can be applied to larger particles or groups of particles such as atoms.
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Note that the possibility of time travel in the quantum world was first predicted back in 1991.
The "properties of quantum particles" are fuzzy, which gives them enough wiggle room to avoid conflicting situations in time travel, "said Professor Timothy Ralph, one of the researchers involved in the simulation.