Chen, HongbinFitzpatrick, A. LiamKaplan, JaredLi, Daliang2022-05-112022-05-112019-06H. Chen, A.L. Fitzpatrick, J. Kaplan, D. Li. 2019. "The bulk-to-boundary propagator in black hole microstate backgrounds." Journal of High Energy Physics, Volume 2019, Issue 6, https://doi.org/10.1007/jhep06(2019)1071029-8479https://hdl.handle.net/2144/44394First-quantized propagation in quantum gravitational AdS3 backgrounds can be exactly reconstructed using CFT2 data and Virasoro symmetry. We develop methods to compute the bulk-to-boundary propagator in a black hole microstate, ⟨𝜙𝐿𝒪𝐿𝒪𝐻𝒪𝐻⟩, at finite central charge. As a first application, we show that the semiclassical theory on the Euclidean BTZ solution sharply disagrees with the exact description, as expected based on the resolution of forbidden thermal singularities, though this effect may appear exponentially small for physical observers.en-USCopyright The Authors. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0.http://creativecommons.org/licenses/by/4.0/Article10.1007/jhep06(2019)107400909