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Time may not exist

02.02.2023

The researchers found that causality, not time, is the main characteristic of our universe.

Australian Catholic University expert Sam Baron believes that physics is in crisis. For the past century, scientists have been explaining the universe in terms of two extremely successful theories: general relativity and quantum mechanics. According to him, quantum mechanics successfully justifies working in the incredibly tiny world of particles and their interactions. At the same time, the general theory of relativity describes the general picture of gravity and the movement of objects.

These theories largely contradict each other. Therefore, scientists believe that they should be replaced by one common. In particular, we are talking about the theory of "quantum gravity", which should explain how gravity works on the smallest scale.

At the same time, scientists note that creating a new theory of quantum gravity is an extremely difficult task. One such attempt was string theory. She replaced particles with strings vibrating in 11 dimensions. However, string theory ran into some difficulties. The theory describes a universe similar to ours, but does not provide any clear predictions that could be tested through experiments. Thus, the theory put forward can neither be confirmed nor refuted, the scientists added.

The most famous approach after that was loop quantum gravity. It says that the fabric of space and time consists of a network of very small discrete fragments, in other words "loops". One of the most powerful features of loop quantum gravity is the abolition of time.

“Loop quantum gravity is not the only theory that eliminates time. A number of other approaches also eliminate time as a fundamental aspect of reality. There are no tables, chairs or even people in the theories of physics, and yet we still know that all this exists. We know very well that all of the above is made up of fundamental particles, but we have no idea what time can "consist" of. Until we can give a clear explanation of how time arises, it is not clear whether we can say that it exists, " - emphasized the scientists.

According to him, based on this, time may not exist in any of the available theories. However, the theories leave the causal relationship intact. That is, physics says that causality, not time, is the main characteristic of our universe.

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