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Both are collapse theories [1][2], but presumably not identical being that the author is aware of Penrose's work and credits Penrose earlier in the article for some terminology as well as acknowledging his influence on the theory in the following footnote form the article: > 6. In this, we have been strongly influenced by considerations in this regard made over 3 decades ago by works such as Penrose, R. Time asymmetry and quantum gravity. In Isham, C.J., Penrose, R., & Sciama, D.W. (Eds.) Quantum Gravity II (1981); Wald, R.M. Quantum gravity and time reversibility. Physical Review D 21, 2742 (1980). The first footnote tells us that the author is referring to GWR theory [3] specifically (which is distinct from Penrose's): > 1. Ghirardi, G.C., Rimini, A., & Weber, T. Unified dynamics for microscopic and macroscopic systems. Physical Review D 34, 470-491 (1986); Pearle, P. Combining stochastic dynamical state-vector reduction with spontaneous localization. Physical Review A 39, 2277-2289 (1989); for a relatively recent review see Bassi, A. & Ghirardi, G. Dynamical reduction models. Physics Reports 379, 257-426 (2003). 1. https://en.wikipedia.org/wiki/Objective-collapse_theory 2. https://plato.stanford.edu/entries/qm-collapse/ 3. https://en.wikipedia.org/wiki/Ghirardi%E2%80%93Rimini%E2%80%... |