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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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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251023T120000
DTEND;TZID=Europe/Madrid:20251023T130000
DTSTAMP:20260415T090641
CREATED:20251020T062308Z
LAST-MODIFIED:20251125T081103Z
UID:23380-1761220800-1761224400@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Inflationary Particle Production and the Swampland
DESCRIPTION:Speaker: Joaquin Masias (Munich\, Max Planck Institute) \nVenue&Time: Red Room / 12:00 PM \nAbstract: TBA
URL:https://www.ift.uam-csic.es/event/sps-journal-club-inflationary-particle-production-and-the-swampland/
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:20251023T150000
DTEND;TZID=Europe/Madrid:20251023T160000
DTSTAMP:20260415T090641
CREATED:20251008T091234Z
LAST-MODIFIED:20251125T081103Z
UID:23267-1761231600-1761235200@www.ift.uam-csic.es
SUMMARY:Bubble wall dynamics from nonequilibrium quantum field theory
DESCRIPTION:Speaker: Matthias Carosi from Munich\, Tech. U.\n\n\n\n\n\n\n\n\nVenue & Time: Red Room / 15:00\n\nAbstract:\n\n\n\nFirst-order phase transitions in the early universe are a unique probe of physics beyond the Standard Model\, with potential implications for electroweak baryogenesis\, the formation of primordial black holes\, magnetogenesis and the production of dark matter. Upcoming gravitational wave detectors may capture the imprint of such transitions\, but to extract theoretical insights from these signals requires a precise understanding of the underlyingdynamics.\nIn this talk\, I show how the language of nonequilibrium quantum field theory\, combined with the two-particle-irreducible effective action\, provides anatural framework for describing the dynamics of a bubble after nucleation. After a brief introduction to the closed-time-path formalism\, I derive the dynamical equations governing the bubble and the plasma\, and identify all sources of friction for thebubble expansion. This framework unifies the pre-existing approaches within a single\, consistent description. In the ultrarelativistic regime\, I demonstrate how to compute the friction induced by the pair production of heavy scalar particles and outline the contributions of particle mixing andtransition radiation.
URL:https://www.ift.uam-csic.es/event/seminar-by-matthias-carosi/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251023T170000
DTEND;TZID=Europe/Madrid:20251023T180000
DTSTAMP:20260415T090641
CREATED:20251020T094357Z
LAST-MODIFIED:20251124T122916Z
UID:23388-1761238800-1761242400@www.ift.uam-csic.es
SUMMARY:Old Journal Club: S. W. Hawking\, Black holes and thermodynamics
DESCRIPTION:Christian Aoufia (IFT) will present S. W. Hawking\, Black holes and thermodynamics\, Phys. Rev. D\, vol. 13\, no. 2\, pp. 191–197\, 1976. doi: 10.1103/PhysRevD.13.191\n\nVenue & Time: Blue Room / 17:00\n\nAbstract:\n\nThe concept of entropy is examined with an eye toward gaining insight into the nature of black-hole thermodynamics. Definitions of entropy are given for ordinary classical and quantum-mechanical systems which lead to plausibility arguments for the ordinary laws of thermodynamics. The treatment of entropy for a classical system is in the spirit of the information-theory viewpoint\, but by explicitly incorporating the coarse-grained observable into the definition of entropy\, we eliminate any nonobjective features. The definition of entropy for a quantum-mechanical system is new\, but directly parallels the classical treatment. We then apply these ideas to a self-gravitating quantum system which contains a black hole. Under some assumptions—which\, although nontrivial\, are by no means exotic—about the nature of such a system\, it is seen that the same plausibility arguments which lead to the ordinary laws of thermodynamics for ordinary systems now lead to the laws of black-hole mechanics\, including the generalised second law of thermodynamics. Thus\, it appears perfectly plausible that black-hole thermodynamics is nothing more than ordinary thermodynamics applied to a self-gravitating quantum system.\n\n\nMore info: https://inspirehep.net/literature/113269
URL:https://www.ift.uam-csic.es/event/old-journal-club-s-w-hawking-black-holes-and-thermodynamics/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
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