There is already a quantum theory of gravity, the only possible one; GR. Why does everyone dislike it? For detailed discussion see book
Massless Representations of the Poincaré Group.
The time dimension cannot be come spacelike. The dimension must be 3+1. For proof see the book
Our Almost Impossible Universe:
Why the laws of nature make the existence of humans extraordinarily unlikely
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There is already a quantum theory of gravity, the only possible one; GR. Why does everyone dislike it? For detailed discussion see book
Massless Representations of the Poincaré Group.
The time dimension cannot be come spacelike. The dimension must be 3+1. For proof see the book
Our Almost Impossible Universe:
Why the laws of nature make the existence of humans extraordinarily unlikely