Islands and mixed states in closed universes
نویسندگان
چکیده
A bstract We investigate the appearance of islands when a closed universe with gravity is entangled non-gravitating quantum system. use braneworlds in three-dimensional multiboundary wormhole geometries as model to explore what happens system has several components. The braneworld can be either completely contained entanglement wedge one systems or split between them. In former case, other leads mixed state universe, unlike simpler setups single system, where was necessarily pure state. show that entropy this bounded by half coarse-grained effective theory on braneworld.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2021
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep07(2021)022