# Bulk reconstruction using lightcone cuts A powerful and generally believed feature of [[0001 AdS-CFT|AdS/CFT]] states that the bulk state is encoded in the boundary. An important question is how. Lightcone cuts provide one perspective that is relatively explicit: it tells you exactly how, at least when it comes to reproducing the bulk metric. ## Refs - originals - [[2016#Engelhardt, Horowitz (May)]] - [[2016#Engelhardt, Horowitz (Dec)]] - properties - [[2025#Caron-Huot, Chakravarty, Namjou]]: bulk causality and the corresponding boundary property - extensions - [[2020#Hernandez-Cuenca, Horowitz]]: reconstructs the full metric that asymptotes to $\operatorname{AdS}_n \times {S}^k$ - [[2021#Folkestad, Hernandez-Cuenca]]: - NCC together with the causal structure significantly constrain the metric - in vacuum, the full metric can be reconstructed - with matter, approximate metric can be reconstructed - [[2021#Takeda]]: explicit reconstructions and relation to entanglement entropy - [[2022#Sugiura, Takeda]]: using causal information surfaces and a new type of kinematic space ## Related topics - parent page: [[0026 Bulk reconstruction]] - [[0219 Entanglement wedge reconstruction]]