The twin paradox known from Einstein's special theory of relativity. This thought experiment revolves around a pair of twins: While one brother travels into space, the other remains on Earth. Consequently, for a certain period of time, the twins are moving in different orbits in space. The result when the pair meets again is quite astounding: The twin who has been travelling through space has aged much less than his brother who stayed at home. This phenomenon is explained by Einstein's description of time dilation: Depending on the speed and where in the gravitational field two clocks move relative to each other, they tick at different speeds.
It’s also been verified by real world experiments, and is even taken into consideration in order for everyday GPS technology to work.”
In the quantum version, rather than twins there will be only one particle traveling in a quantum superposition.
A quantum superposition means the particle is in two locations at the same time, in each of them with some probability, and yet this is different to placing the particle in one or the other location randomly.
It’s another way for an object to exist, only allowed by the laws of quantum physics.
This would leave an unmistakable signature in the results of the experiment, and that’s what we hope will be found when the experiment is realized in the future.
It could lead to advanced technologies that will allow physicists to build more precise sensors and clocks – potentially, a key part of future navigation systems, autonomous vehicles and earthquake early-warning networks.
The experiment itself will also answer some open questions in modern physics.