Quantum strong cosmic censorship without F-locality

Let SS be a strictly partial Cauchy surface of the (not necessarily globally hyperbolic) spacetime (M,gab)(M,g_{ab}), and let D(S)D(S)) be its domain of dependence. Regard (D(S),g^ab)(D(S),\hat g_{ab}) as a globally hyperbolic spacetime, with g^ab=ψ1gab\hat g_{ab}=\psi^{-1*}g_{ab}. Let B\mathscr{B} be a free or perturbatively interacting quantum field theory over (D(S),g^ab)(D(S),\hat g_{ab}), and let ω:BC\omega:\mathscr{B}\to\mathbb{C} be a pure Hadamard state with two-point function ω2D(D(S)×D(S))\omega_2\in\mathscr{D}'(D(S)\times D(S)). Quantum strong cosmic censorship without FF-locality. The extension of ω2\omega_2 as a distribution in D(D(S)×D(S))\mathscr{D}'(\overline{D(S)}\times\overline{D(S)}) fails to satisfy the Hadamard condition at the boundary. This formulation removes the FF-locality assumption and directly constrains the boundary behaviour of the two-point function; it remains open.

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Primary source

Benito A. Juárez-Aubry, “Quantum strong cosmic censorship and black hole evaporation”, arXiv:2305.01617 (2024).

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