dekoherenssille
Dekoherenssille (Finnish term for decoherence) is the process in quantum mechanics by which a system loses its quantum coherence due to interaction with its environment. It describes how coherent superpositions become effectively classical when the system becomes entangled with many degrees of freedom and the observable interference terms become unobservable.
Mechanism: When a quantum system is not isolated, its state becomes entangled with environmental degrees of
Significance: Decoherence provides a framework to understand the emergence of classical properties without invoking a fundamental
History and terminology: Although the underlying ideas date to Zeh and Zurek in the 1980s and 1990s,
See also: open quantum systems, decoherence theory, density matrix, quantum measurement problem, Einselection.