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X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
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DTSTART;TZID=Europe/Madrid:20260602T113000
DTEND;TZID=Europe/Madrid:20260602T130000
DTSTAMP:20260614T013201
CREATED:20260527T130818Z
LAST-MODIFIED:20260527T130956Z
UID:25101-1780399800-1780405200@www.ift.uam-csic.es
SUMMARY:Holo-Club: From Volume as a Clock to Boundary Dynamics in JT Gravity
DESCRIPTION:Title: From Volume as a Clock to Boundary Dynamics in JT Gravity \nSpeaker: Farbod-Sayyed Rassouli (University of Nottingham) \nVenue&Time: 11:30 / Blue Room \nAbstract: \nDifferent notions of time arise from different choices of observer. In cosmological settings\, a particularly natural choice is the spacetime volume\, which is conjugate to the cosmological constant. This leads to a notion of unimodular time that deparametrizes the Wheeler–DeWitt equation into a Schrödinger-like evolution equation\, while also inducing a natural time variable at the boundary. In this talk\, I will first explain how this construction arises in arbitrary dimension\, with particular emphasis on the 4D case. I will then turn to Jackiw–Teitelboim gravity\, where promoting the vacuum cosmological constant to a dynamical top-form degree of freedom provides a bulk clock in the Henneaux–Teitelboim sense. On the boundary\, this modifies the usual Schwarzian dynamics by coupling it to an additional U(1) phase mode\, reproducing the universal low-energy structure familiar from complex SYK. I will show how the corresponding boundary theory can itself be rewritten as a (0+1)-dimensional observer action\, making explicit the relation between the bulk volume clock and its holographic boundary counterpart. \narXiv:2601.07911
URL:https://www.ift.uam-csic.es/event/holo-club-from-volume-as-a-clock-to-boundary-dynamics-in-jt-gravity/
LOCATION:Blue 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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DTSTART;TZID=Europe/Madrid:20260602T140000
DTEND;TZID=Europe/Madrid:20260602T150000
DTSTAMP:20260614T013201
CREATED:20260406T092426Z
LAST-MODIFIED:20260406T092426Z
UID:24831-1780408800-1780412400@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-28/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260602T150000
DTEND;TZID=Europe/Madrid:20260602T160000
DTSTAMP:20260614T013201
CREATED:20260527T141356Z
LAST-MODIFIED:20260603T093853Z
UID:25107-1780412400-1780416000@www.ift.uam-csic.es
SUMMARY:A diffuse flux of MeV ALPs
DESCRIPTION:Title: ‘A diffuse flux of MeV ALPs’ \nSpeaker: Marina Cermeño \nVenue&Time: Red Room / 15:00 \nAbstract: MeV scale axion-like particles can be produced with semi-relativistic velocities in Galactic supernovae\, leading to a diffuse flux that can be detectable in neutrino water-Cherenkov detectors (Super + HyperK). In this talk\, I will explain the details of the calculation that we recently did in 2602.17597 also with some content from our previous works 2412.09595 \, 2412.19890) \n 
URL:https://www.ift.uam-csic.es/event/a-diffuse-flux-of-mev-alps/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
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