# Lorentzian factorisation problem The so-called Lorentzian factorisation problem is the apparent puzzle that arises from the existence of Lorentzian wormholes that connect more than one asymptotic boundary, e.g., a two-sided black hole. Moreover, there exist states such as a Wilson line that goes through the wormhole. Such a state does not factorise, hence the name of the puzzle. Note that this is different from the Euclidean factorisation problem, which is often just called the [[0249 Factorisation problem|factorisation problem]]. ## Refs - [[2015#Harlow]] - [[2018#Harlow, Jafferis]]: in JT gravity - [[2022#Bzowski]] - [[2024#Boruch, Iliesiu, Lin, Yan]]: resolution in [[0050 JT gravity|JT]] - [[2024#Balasubramanian, Craps, Hernandez, Khramtsov, Knysh (Oct)]] and [[2024#Li (P)]]: resolution in higher dimensions using matter shells - [[2024#Banerjee, Erdmenger, Karl]]: works with the time-shifted TFD ## Related - [[0249 Factorisation problem]]