BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jonah Kudler-Flam (IAS Princeton) DTSTART:20230425T193000Z DTEND:20230425T203000Z DTSTAMP:20260423T005839Z UID:HET/50 DESCRIPTION:Title: Hor izons as eavesdroppers: decoherence from soft radiation\nby Jonah Kudl er-Flam (IAS Princeton) as part of Purdue HET\n\n\nAbstract\nRecently\, Da nielson\, Satishchandran\, and Wald proposed a novel mechanism for decoher ence in spacetimes with Killing horizons. When Alice performs a Stern-Gerl ach type experiment outside the horizon\, there is a fundamental rate of d ecoherence due to the emission of soft gravitons/photons that radiate away information. In this talk\, I will sharpen and generalize this mechanism by recasting the gedankenexperiment in the language of (approximate) quant um error correction. By explicitly computing the quantum fidelity between the vacuum state on the horizon and the state with soft radiation propagat ing through the horizon\, we characterize how much an eavesdropper (Eve) b ehind the horizon is able to learn about Alice's experiment. From the info rmation-disturbance tradeoff\, there is a direct relation between the info rmation gained by Eve and the decoherence of Alice's generalized experimen t. I will comment on how an information-theoretic language may lead to new insights on energy/entropy inequalities\, islands\, and the central dogma of black holes.\n LOCATION:https://researchseminars.org/talk/HET/50/ END:VEVENT END:VCALENDAR