Pilot wave theory, also known as the de Broglie-Bohm theory, is an interpretation of quantum mechanics that proposes the existence of a guiding wave that determines the behavior of particles in addition to the usual wave function.
Pilot wave theory differs from other interpretations, such as the Copenhagen interpretation, by proposing the existence of a physical, non-local, and deterministic wave that determines the probabilistic behavior of particles in quantum systems.
Currently, there is no direct evidence that supports Pilot wave theory. However, it is a mathematically consistent interpretation of quantum mechanics and has been shown to reproduce the same predictions as the Copenhagen interpretation in many experiments.
One of the main criticisms of Pilot wave theory is that it requires the existence of a non-local guiding wave, which goes against the principles of special relativity. Additionally, it has not yet been able to explain certain phenomena, such as quantum entanglement, in a satisfactory manner.
Pilot wave theory challenges our traditional understanding of reality by proposing a deterministic universe, in contrast to the probabilistic nature of quantum mechanics. It also suggests that particles have definite positions and trajectories, which could have significant implications for our understanding of fundamental physics and the nature of reality.