In spacetimes with horizons, information seems to be lost when it falls behind an observer’s horizon. However, unitary quantum mechanical evolution implies that information should not be lost. For certain black hole solutions, careful studies of entanglement entropy have revealed how this tension can be resolved. In this talk, I will investigate to what extent these results can be applied to de Sitter space in which similar paradoxes appear. Making use of maximal entanglement and gravitational shockwaves, I will argue that a static observer can recover information from behind their cosmological horizon in a scrambling time. This is consistent with a unitary quantum mechanical dual of the de Sitter static patch.

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If you are not an ICCUB member and would like to attend this activity, please send an email to Marija Tomasevic or Jairo Martínez.