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SUMMARY:Ph. D. Thesis: Classically Consistent Theories of Interacting Spin
 -2 Fields
DTSTART:20131212T123000Z
DTEND:20131212T140000Z
DTSTAMP:20261009T015000Z
UID:indico-event-4205@indico.fysik.su.se
DESCRIPTION:Speakers: Angnis Margreta Schmidt-May (Stockholm University\, 
 Department of Physics)\n\nThis doctoral thesis comprises a study of recent
 ly developed nonlinear theories for massive spin-2 fields that go by the n
 ames of Massive Gravity and Bimetric Theory. As we demonstrate in a Hamilt
 onian analysis\, the construction of these theories avoids the notorious B
 oulware-Deser ghost instability that generically plagues nonlinear spin-2 
 interactions and renders their description inconsistent. We explore the ma
 ss spectrum of ghost-free Bimetric Theory and reformulate its action in te
 rms of nonlinear mass eigenstates. A generalized version of the theory wit
 h multiple vielbein interactions is reviewed and then reexpressed in terms
  of metrics. Homogeneous and isotropic solutions to the equations of motio
 n in Bimetric Theory are derived and discussed in the context of cosmology
 . We furthermore single out particular values for the parameters in the bi
 metric interaction potential for which the theory could potentially contai
 n an additional gauge redundancy. This establishes a unique candidate for 
 a nonlinear theory of a partially massless spin-2 field. Finally\, we reve
 al a close connection of Bimetric Theory to a certain class of higher-curv
 ature theories for gravity and offer a solution to their ghost problems. I
 n particular we find that\, in four space-time dimensions\, the bimetric c
 andidate for nonlinear partial masslessness is closely related to Conforma
 l Gravity.\n\nhttps://indico.fysik.su.se/event/4205/
LOCATION:FA 32
URL:https://indico.fysik.su.se/event/4205/
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