# Hamilton-Kabat-Lifschytz-Lowe (HKLL) reconstruction HKLL gives explicit [[0026 Bulk reconstruction|bulk reconstruction]] expressions in the causal wedge, but not in the generally larger [[0219 Entanglement wedge reconstruction|entanglement wedge]]. ## Refs - original [[HamiltonKabatLifschytzLowe2006]] ## Extensions - [[Terashima2021]][](https://arxiv.org/pdf/2104.11743.pdf) - HKLL has a simpler form - [[BhattacharjeeKrisnanSarkar2022]][](https://arxiv.org/pdf/2209.01130.pdf): for non-normalisable modes - [[2023#Bhattacharjee, Mukherjee]]: normalizable and non-normalizable modes of $p$-forms and the graviton ## Euclidean - cannot be done: HKLL requires freezing the normalisable part (does not add sources), but there is no smooth solution in the Euclidean case if setting coefficient of the non-normalisable part zero but that of normalisable part non-zero (Rangamani, TASI 2021)