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PRODID:Faculty of Science and Engineering - Research
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SUMMARY:GAnG Seminar: Joydeep Chakravarty
DESCRIPTION;ENCODING=QUOTED-PRINTABLE: Title: Imaging black holes at high frequency=0D=0A=
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Abstract: We devise a formalism to probe local physics about a bulk point in general geometries using boundary correlators. In the exterior region, this allows for the factorization of boundary correlators in terms of flat-space like scattering amplitudes. The formalism also leads to direct measurements using lightcones emerging from the bulk point, capturing the boundary imprint of bulk causality.=0D=0A=
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Next, we use it to understand the physics of the black hole interior using the past lightcone, where we generalize known relations involving two-point correlators to spectral density tails and to four-point correlators.  Details about the interior tunnel to the exterior at the cost of a Boltzmann suppression exp(-1/(2Tx)), where x is the desired spatial resolution. We comment on the relation (or lack thereof) between such measurements and the experience of infalling observers.
LOCATION:MB503
DTSTART:20251021T140000
DTEND:20251021T153000
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