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SUMMARY:The dark dimensions of the Universe
DTSTART:20261015T030000Z
DTEND:20261015T040000Z
DTSTAMP:20261023T213100Z
UID:indico-event-5355@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Ignatios Antoniadis (LPTHE Sorbonne Université and 
 Chulalongkorn University)\n\nAbstract: \nExtra dimensions are an importan
 t ingredient of theories of quantum gravity such as string theory. If thei
 r size is large\, gravity becomes strong at energies lower than the Planck
  scale with important theoretical and observational consequences. I will a
 rgue on the possibility that extra dimensions acquire large size by higher
  dimensional inflation\, relating the weakness of the actual gravitational
  force to the size of the observable universe. Although this can be realis
 ed for any number of extra dimensions\, the requirement of (approximate) f
 lat power spectrum of primordial density fluctuations consistent with pres
 ent observations makes this simple proposal possible only for one or two e
 xtra dimensions at around the micron scale. This scenario can then be nice
 ly combined with the Dark Dimension proposal for the cosmological constant
 \, stemmed from the large distance swampland conjecture. I will describe i
 ts main phenomenological consequences in particle physics and cosmology.\n
 Biography: \nProf. Ignatios Antoniadis holds a Doctorat d’État from É
 cole Polytechnique and a PhD from École Normale Supérieure\, both in Par
 is. He has held positions at research institutions including CERN\, CNRS\,
  and Sorbonne University\, and is currently a Distinguished Visiting Profe
 ssor at the Tsung-Dao Lee Institute\, Shanghai Jiao Tong University. He ha
 s also served as a visiting professor at Harvard University and as a Membe
 r of the Institute for Advanced Study in Princeton. His research focuses o
 n quantum field theory\, particle physics\, string theory\, and cosmology.
  He has published over 320 scientific articles\, with more than 30\,000 ci
 tations and an h-index of 83. His honors include an ERC Advanced Grant and
  the CNRS Silver Medal.\nAlternative online link：https://meeting.tencent
 .com/dm/OlDWH5b1jNIs\nID: 442616303\n\nhttps://indico-tdli.sjtu.edu.cn/eve
 nt/5355/
LOCATION:Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/5355/
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