Nonlinearity in Quantum Theory and Closed Timelike Curves
arXiv:gr-qc/9409003 · doi:10.1103/PhysRevD.52.5676
Abstract
We examine consequences of the density matrix approach to quantum theory in the context of a model spacetime containing closed timelike curves and find that in general, an initially pure state will evolve in a nonlinear way to a mixed quantum state. CPT invariance and the implications of this nonlinearity for the statistical interpretation of quantum theory are discussed.
17 pages plain TeX, DAMTP R/94/34