Abstract
An old black hole can tunnel into a white hole/firewall by emitting large baby universes. This phenomenon was investigated in Jackiw-Teitelboim (JT) gravity for genus one. In this paper, the focus is on higher genus corresponding to emitting more than one baby universe (n > 1). The probability of encountering a firewall or tunneling into a white hole after emitting n baby universes is proportional to e−2nSEe4πEn−1E2n2−n−9/2t4n2−2n−5\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {e}^{-2 nS(E)}{e}^{4\\pi \\sqrt{E}\\left(n-1\\right)}{E}^{2{n}^2-n-9/2}{t}^{4{n}^2-2n-5} $$\\end{document}, where t is the age of the black hole, and S and E represent the entropy and energy of the black hole, respectively.
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