How would our world be perceived by observers moving faster than light in a vacuum? According to theorists from Warsaw and Oxford universities, such a view would differ from what we encounter daily, with the presence of not only spontaneous phenomena but also particles traveling multiple paths simul
Einstein based his special theory of relativity on two assumptions – Galileo’s principle of relativity and the constancy of the speed of light. As Andrzej Dragan argues, the first principle is crucial, which assumes that in every inertial system, the laws of physics are the same, and all inertial observers are equal.
presented for the first time in the article “Quantum principle of relativity” published two years ago in theThere they considered the simplified case of both families of observers in a space-time consisting of two dimensions: one spatial and one time dimension. In their latest publication “Relativity of superluminal observers in 1 + 3 spacetime”, a group of 5 physicists goes a step further – presenting conclusions about the full four-dimensional spacetime.
As the authors of the publication prove, the inclusion of superluminal observers in the description requires the creation of a new definition of velocity and kinematics. – This new definition preserves Einstein’s postulate of the constancy of the speed of light in a vacuum even for superluminal observers – prove the authors of the paper. “Therefore, our extended special relativity does not seem like a particularly extravagant idea” adds Dragan.
“Until recently it was generally believed that postulates underlying quantum theory are fundamental and cannot be derived from anything more basic. In this work, we showed that the justification of quantum theory using extended relativity, can be naturally generalized to 1 + 3 spacetime and such an extension leads to conclusions postulated by quantum field theory” – write the authors of the publication.
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