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X-WR-CALNAME:Instituto de Física Teórica
X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
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TZID:Europe/Madrid
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DTSTART;TZID=Europe/Madrid:20261022T120000
DTEND;TZID=Europe/Madrid:20261022T130000
DTSTAMP:20261031T042118
CREATED:20261015T081424Z
LAST-MODIFIED:20261015T151902Z
UID:25867-1792670400-1792674000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: "Journey to the Centre of the Black Hole" by Matthew J. Blacker
DESCRIPTION:Strings\, Pheno and the Swampland (SPS) Journal Club. Every Thursday at 12:00 in the Red Room. \nTitle: “Journey to the Centre of the Black Hole” \nVenue & Time: Red Room / 12:00 \n Speaker: Matthew J. Blacker \nAbstract: What can we say about holographic theories\, given what we know about the bulk? Conversely\, how can we use holographic theories to probe regions of the bulk where classical physics breaks down? This talk will explore the link between bulk canonical quantum gravity and holographic theories\, using radial Wheeler-DeWitt states as the bridge. We will discuss how Wheeler-DeWitt states can be used a) to constrain putative holographic duals to de Sitter space\, and b) to probe the interior of black holes and the (chaotic) approach to the singularity. Finally\, we will explain how these radial states relate to $T^2(+ \Lambda_2)$ deformed field theories.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-2/
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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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20261022T150000
DTEND;TZID=Europe/Madrid:20261022T160000
DTSTAMP:20261031T042118
CREATED:20260930T074111Z
LAST-MODIFIED:20261026T121003Z
UID:25765-1792681200-1792684800@www.ift.uam-csic.es
SUMMARY:Seminar by Bethany Anne Suter (Fermilab and IFT): “Dark matter sensitivity projections for all known inorganic materials”
DESCRIPTION:Title: Dark matter sensitivity projections for all known inorganic materials \nSpeaker: Bethany Anne Suter \nVenue & Time: Red Room / 15:00 \nAbstract: In this talk\, I will discuss my work on performing the highest-throughput search and evaluation of inorganic materials that can serve as excellent low-mass dark matter detectors. We use a graph neural network (GNN) based on the GNNOpt architecture to learn and generate dielectric tensors\, loss functions and sensitivity curves for both isotropic and anisotropic materials. Since the only required input for this GNN model is the structure of the unit cell\, this analysis can now be expanded to any known inorganic material\, increasing the number of materials analyzed by over 2 orders of magnitude. We apply this model to all materials available on the Materials Project database and show the results for absorption and scattering between dark matter and electrons. We also extend the GNN to predict anisotropy in the materials and calculate daily modulation in the interaction rates\, which enables sensitivity to the dark matter wind. The training dataset is derived from nearly one thousand DFT-calculated dielectric tensors taken from Materials Project as well as previously calculated loss functions and sensitivity curves. The GNN predicts the output to percent level accuracy with no prior knowledge of DFT and the output obeys the Kramers-Kronig relations and physical sum rules similarly to the original dataset.
URL:https://www.ift.uam-csic.es/event/bethany-anne-suter/
LOCATION:Madrid
CATEGORIES:Colloquia,Scientific activities,Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20261022T170000
DTEND;TZID=Europe/Madrid:20261022T180000
DTSTAMP:20261031T042118
CREATED:20261015T080624Z
LAST-MODIFIED:20261015T080624Z
UID:25865-1792688400-1792692000@www.ift.uam-csic.es
SUMMARY:Old Journal Club: “Distortions of the Background Radiation Spectrum”
DESCRIPTION:Title: Distortions of the Background Radiation Spectrum \nSpeaker: Mikel Martin Barandiaran \nVenue & Time: Blue Room / 17:00 \nAbstract: The discovery of cosmic blackbody radiation with a temperature of 2.7 K is widely considered as powerful evidence for the hot\, big-bang model of the universe. As first discussed by Gamow\, it is assumed that a very hot\, dense plasma was present during the early stages of the universe\, and interaction of photons and electrons leads inevitably to an equilibrium (blackbody) spectrum. The shape of the equilibrium spectrum is preserved during the subsequent expansion and cooling\, although the radiation temperature decreases to the value of 2.7 K observed today.
URL:https://www.ift.uam-csic.es/event/old-journal-club-distortions-of-the-background-radiation-spectrum/
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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