Theoretical Physics Wednesday Seminar: Giuseppe Dibitetto

  • Date: –15:00
  • Location: Ångströmlaboratoriet, Lägerhyddsvägen 1 Å4101
  • Lecturer: Giuseppe Dibitetto
  • Contact person: Vladimir Procházka
  • Seminarium

Plenty of reasons to worry about 'Nothing'

I will start by reviewing the original construction of Witten's "bubble of nothing" destroying the 5D KK vacuum. Subsequently I'll present a fully analytic treatment for bubbles of nothing in higher dimensions by using the Hamilton-Jacobi formalism. The actual geometry will be related to non-extremal black branes by double analytic continuation. I will then continue by discussing the relevance of this analysis in the context of the conjectured instability of non-supersymmetric AdS vacua in string theory. Finally, I will conclude by presenting an explicit example in a non-supersymmetric AdS_7 vacuum of M-theory.