I just watched a brief talk[1] over at Pirsa about the emergence of Lorentzian signature and time dimension from quantum fluctuations. As I understood it, star

I just watched a brief talk[1] over at Pirsa about the emergence of Lorentzian signature and time dimension from quantum fluctuations. As I understood it, starting with a uniform 4D metric, and then introducing a certain amount of asymmetrical "noise" to the background field through particle coupling, one of the dimensions got an effective sign flip in the metric leading to spacetime metric signature we know and love. Just a layman so can't comment on the details, but sounded interesting. [1]: https://doi.org/10.48660/25060082 https://doi.org/10.48660/25060082