LARGE CORRELATIONS IN PARTICLE PRODUCTION AND SQUEEZING PHENOMENA

Recent developments in studies of multiparticle correlations in high energy particle collisions are reviewed. Both experimental data and theoretical results in quantum chromodynamics are discussed. Application of the developed methods to the coherent, squeezed and correlated states of photons is considered. Some speculations concerning possible coherent and squeezed states of pion fields as well as their specific features are described.