The dynamical and information aspects of the behaviour of complex physical systems are considered. In classical physics the information coupling appears in the interaction of nonlinear systems with stohastic behaviour when a small external perturbation may greatly alter the paths of a classical system in phase space. In quantum systems the information coupling to the environment appears in measurement processes when the coherence of the wave function of a quantum object is destroyed and corresponding information appears in the external environment. These processes can be described in terms of the collapse of wave functions. Numerous examples of the collapse are considered, including those leading to the classical behaviour of macroscopic bodies with the information coupling to a nonequilibrium environment. The Einstein-Podolsky-Rosen paradox is discussed in detail together with its possible role in the processes of information transfer over a distance.

PACS: 03.65.Bz, 05.45.+b, 05.70.Ln, 89.70.+c (all) DOI: 10.1070/PU1994v037n05ABEH000109 URL: https://ufn.ru/en/articles/1994/5/a/ A1994PG23700001 Citation: Kadomtsev B B "Dynamics and information" Phys. Usp. 37 425–499 (1994) BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks RT Journal T1 Dynamics and information A1 Kadomtsev,B.B. PB Physics-Uspekhi PY 1994 FD 10 May, 1994 JF Physics-Uspekhi JO Phys. Usp. VO 37 IS 5 SP 425-499 DO 10.1070/PU1994v037n05ABEH000109 LK https://ufn.ru/en/articles/1994/5/a/ Оригинал: Кадомцев Б Б «Динамика и информация» УФН 164 449–530 (1994); DOI: 10.3367/UFNr.0164.199405a.0449