Objective collapse theories differ from the Copenhagen interpretation TDA8947J
in regarding both the wavefunction and the process of collapse as ontologically objective. In objective theories, collapse occurs randomly (spontaneous localization), or when M48T18-150PCI
some physical threshold is reached, with observers having no special role. Thus, they are realistic, indeterministic, no-hidden-variables theories. The mechanism of collapse is not specified AK97-01553A
by standard quantum mechanics, which needs to be extended if this approach is correct, meaning that Objective Collapse is more of a theory than an interpretation. Examples include the Ghirardi-Rimini-Weber theory STK014
and the Penrose interpretation.An entirely classical derivation and interpretation of Schr?dinger's wave equation by analogy with Brownian motion was suggested by Princeton University professor Edward Nelson in 1966.Similar considerations had previously k2645
been published, for example by R, and Walter Weizel, and are referenced in Nelson's paper. More recent work on the stochastic interpretation has been done by M. Pavon.An alternative stochastic interpretation was developed by Roumen Tsekov.