Bell’s theorem

Bell’s theorem is a fundamental result in quantum mechanics that concerns the nature of physical reality. The theorem was first proposed by physicist John S. Bell in 1964, and it has since been extensively studied and tested through experiments.

The theorem states that if certain assumptions of local realism are valid, then there are limits to the correlations that can exist between the measurements of two entangled particles. In other words, if two particles are entangled, their states will be correlated, but the nature of that correlation cannot be explained by local hidden variables.

Local realism is the idea that physical properties of a system exist independently of observation and that information cannot travel faster than the speed of light. Bell’s theorem shows that if local realism is true, then there are limits to the degree of correlation that can exist between measurements on entangled particles.

Experiments testing Bell’s theorem have been performed on entangled pairs of photons and other particles. These experiments have consistently shown that the correlations between entangled particles cannot be explained by local hidden variables and support the predictions of quantum mechanics.

The implications of Bell’s theorem have been widely debated and discussed among physicists, and it has led to a better understanding of the nature of physical reality and the role of measurement in quantum mechanics. learn more about Learning Management System.