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https://www.physicsforums.com/showpost.php?p=3263502&postcount=94
Actually, thinking even about AdS/CFT which is commonly said to be emergent space, but not emergent time, if the bulk geometry is pseudo-Riemannian, which has multiple timelike directions at each point, shouldn't time emerge too?
mitchell porter said:At the moment, it only works properly for an emergent AdS space, but if the dS/CFT correspondence can be understood, then this will be true for spaces of positive curvature as well. (In dS/CFT the boundary is purely spacelike and lies in the infinite past and future, rather than being timelike as in AdS/CFT, so it's as if the timelike direction in the Lorentzian gravitational space is emerging from Euclidean field theory on a sphere in the infinite past.)
Actually, thinking even about AdS/CFT which is commonly said to be emergent space, but not emergent time, if the bulk geometry is pseudo-Riemannian, which has multiple timelike directions at each point, shouldn't time emerge too?