From prlina at ipb.ac.rs Wed Jan 22 11:41:22 2025 From: prlina at ipb.ac.rs (prlina) Date: Wed, 22 Jan 2025 11:41:22 +0100 Subject: [phys4phys] Group for Gravitation, Particles and Fields seminar, Wednesday, 29 January 2025 Message-ID: Dear colleagues, You are cordially invited to the seminar of the Group for Gravitation, Particles and Fields, which will be held on Wednesday, 29 January 2025, at 13:00 at the University of Belgrade Faculty of Physics, lecture hall 665. Please note that the seminar location and time are different than usual. The talk entitled: Higher form symmetries of the M2-brane will be given by Mar?a Del Pilar Garc?a Del Moral Zabala (Science and Technology Faculty Universidad de La Rioja, Spain). Abstract: In this talk I will describe the existence of invertible Higher form symmetries on the M2-brane. I will explain the cancellation of the 't Hooft anomaly and how in the cases of compactified spaces this is related to the existence of a 1-Gerbe structure over the M2-brane that when projected on the spatial part of the worldvolume represents a flux condition. Interestingly, the major part of the sectors of the M2-brane that have been found with good quantum properties are associated to the imposition of a worldvolume flux condition. I will also comment briefly on the extension of these symmetries to the non-invertible case. ********************************************* Time: January 29, 2025 13:00 Belgrade University of Belgrade Faculty of Physics, room 665, 3rd floor ********************************************* Best regards, Igor Prlina From nikolam at turing.mi.sanu.ac.rs Sat Jan 25 11:39:55 2025 From: nikolam at turing.mi.sanu.ac.rs (nikolam at turing.mi.sanu.ac.rs) Date: Sat, 25 Jan 2025 11:39:55 +0100 Subject: [phys4phys] =?utf-8?q?Seminar_za_teoriju_relativnosti_i_kosmolos?= =?utf-8?q?k=D0=B5_modele?= Message-ID: ????????? ?????????? ? ??????, ?? ???????????? ??? ???????? ?? ????????? ?? ???????? ?? ??????? ???????????? ? ?????????? ?????? ???? ?? ??????? ???????? ??????? ????????? ?? ??????? ???? ???? ? ????????, ? ????? 29. ??????? ? ???? 301? ???????????? ?????????, ????? ?????, ? 12 ??????. 29. ??????, ????? ? 12 ??????. ??????? ?????????, ???? On some problems of mathematical physics We plan to briefly touch on the following topics as well: problem of two body, moving of planets, rotation motion which produces tide (Earth - Moon) and applications to Special Theory of Relativity (STR) - hyperbolic geometry, geometry of the Minkowsky. ??????? ??? ??? ???????????? ????????? ?? ?????? ?????? ??????? ?? ???????? ????? (????? ??? ?? ?????????): https://miteam.mi.sanu.ac.rs/asset/QPYfBbqdhTF5spTAt ???????????? ?? ?????? ?? ???????? ?? ???????? ?? ???????? ?????: https://miteam.mi.sanu.ac.rs/asset/CyzPn2zriMsWWNzii ??????????? ????????? ???? ??????? ????????? ?? ???? ????? (??? ?? ???? ?????????? ?????? ???? ????? ??????): https://miteam.mi.sanu.ac.rs/call/yujMwF3JyYqzw6Jth/2m0heDiyDRqBDFTDIItulzyPrdbs5PT8mt_WmgRpRgr --------------------------------------- ??????????? ???????? ????, ???? ????????? 36, ??????? *??????? ?? ??????? ???????????? ? ?????????? ??????* ?????? ???????? ???????? https://www.mi.sanu.ac.rs/novi_sajt/research/seminars/relativity_cosmological.php. ??????????? ???????? ?? ??????? ???????????? ? ?????????? ?????? ????. ?? ????? ?????????? ???????? ???????? ?? ??????? ???????????? ? ?????????? ?????? ?? ?????? ???????? ???????? ???????? ????????? ?? ?? ?????? ?????? ? 12 ??????, ???? 301?. ??????? ???????, ?????? From cubrovic at ipb.ac.rs Wed Jan 29 17:15:09 2025 From: cubrovic at ipb.ac.rs (=?UTF-8?Q?Mihailo_=C4=8Cubrovi=C4=87?=) Date: Wed, 29 Jan 2025 17:15:09 +0100 Subject: [phys4phys] Strings, Holography & Chaos Seminar Feb 5 2025 12:00: Vasilii V. Pushkarev Message-ID: <7c1fb40e18f131bb23abd0180d7d064d@ipb.ac.rs> Dear colleagues, On February 5 (Wednesday) at 12:00 CET we will have a Zoom seminar on chaotic properties of black hole and de Sitter normal modes in the presence of a hard wall, by Vasilii V. Pushkarev. Title, abstract and Zoom coordinates follow. Vasilii V. Pushkarev Steklov Mathematical Institute of Russian Academy of Sciences Spectral form factors for curved spacetimes with horizon In this talk, we present 2412.19672 ?Spectral form factors for curved spacetimes with horizon?. In a recent series of papers (e.g. 2208.14744, 2301.11780 and 2312.14109), it was noted that the spectral form factor defined for normal modes on the BTZ black hole background with a stretched horizon exhibits the dip-ramp-plateau structure in the massless scalar case. Normal modes are understood as the scalar field modes on the curved background with a Dirichlet boundary condition imposed at the horizon instead of the usual infalling boundary condition for quasi-normal modes. In this paper, we have extended the analysis by considering massive scalar on the BTZ background, the de Sitter case as well as the generalized (complex-valued) two- and three-level form factor. Topic: Strings, Holography & Chaos Seminar Feb 5 2025 Time: Feb 5, 2025 11:30 AM Belgrade, Bratislava, Ljubljana Join Zoom Meeting https://zoom.us/j/99340126031?pwd=RTjS6SMwEk16acGKOewNAFuZyq64uE.1 Meeting ID: 993 4012 6031 Passcode: 955555 Hope to see many of you! -- Dr. Mihailo ?ubrovi? Center for the Study of Complex Systems Institute of Physics Belgrade National Institute of the Republic of Serbia Pregrevica 118, 11080 Belgrade, Serbia --