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X-WR-CALDESC:Events for Instituto de Física Teórica
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DTSTART;TZID=Europe/Madrid:20260217T113000
DTEND;TZID=Europe/Madrid:20260217T130000
DTSTAMP:20260610T053021
CREATED:20260209T081242Z
LAST-MODIFIED:20260209T081341Z
UID:24366-1771327800-1771333200@www.ift.uam-csic.es
SUMMARY:Holo-Club: 'Toward Krylov-based holography in double-scaled SYK'
DESCRIPTION:Speaker: Yichao Fu (GIST)\n\nTitle: Toward Krylov-based holography in double-scaled SYK\n\nVenue & Time: Gray Room 3 / 11:30\n\nAbstract:\n\nBuilding on the duality between Krylov complexity and geodesic length in Jackiw-Teitelboim and sine-dilaton gravity\, we develop a precise holographic dictionary for quantities in the Krylov subspace of the double-scaled Sachdev-Ye-Kitaev model (DSSYK). First\, we demonstrate that the growth rate of Krylov state complexity corresponds to the wormhole velocity\, and show that its expectation value in coherent states serves as a boundary diagnostic of firewall-like structures via bulk reconstruction. We also delineate an alternative bulk description in terms of the proper momentum of an infalling particle at early times\, establishing a threefold duality between the Krylov complexity growth rate\, wormhole velocity\, and proper momentum\, with clear regimes of validity. Beyond the first moments\, we argue that higher-order Krylov complexities capture connected bulk contributions encoded by replica wormholes\, while the logarithmic variant probes the replica saddle structure. Finally\, within a third-quantized setting incorporating baby universes\, we show that the Krylov entropy equals the von Neumann entropy of the parent-geometry density matrix obtained after tracing out baby universes\, thereby quantifying information flow into the baby universe sector. Together\, these results elevate Krylov-space observables to sharp probes of bulk dynamics and topology in ensemble-averaged 2D gravity.
URL:https://www.ift.uam-csic.es/event/holo-club-toward-krylov-based-holography-in-double-scaled-syk/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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DTSTART;TZID=Europe/Madrid:20260217T140000
DTEND;TZID=Europe/Madrid:20260217T150000
DTSTAMP:20260610T053021
CREATED:20260216T083930Z
LAST-MODIFIED:20260216T083930Z
UID:24402-1771336800-1771340400@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them.
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-14/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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