..From X. Chen, with dimensions 5 and 6 being timelike and constituting the hidden variables. http://www.arxiv.org/abs/quant-ph/0501034.(adsbygoogle = window.adsbygoogle || []).push({});

This is not a "TD" type of theory, and Chen has the theoretical chops to have been an arxiv contributer for years. I know there has been interest in multiple times here, and this is a pretty interesting example.

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# A Kalusza-Klein Hidden Variables Theory

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