Extensions and Further Work
Work has been done on several models of physical systems with similar characteristics, which are described in detail in the main paper on this model. There are ongoing attempts to extend this model in various ways, such as van Enk's model and the "Pacman Version".
Currently, there is work being done to reproduce quantum formalism from information-theoretic axioms. Although the model itself differs in many respects from quantum theory, it reproduces a number of effects which are considered to be overwhelmingly quantum. As such, the underlying principle, that quantum states are states of incomplete knowledge, may offer some hints as to how to proceed in this manner, and may lend hope to those pursuing this goal.
Read more about this topic: Spekkens Toy Model
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