Speaker
Sungmin Hwang
(Technical University of Munich)
Description
By explicitly constructing the Hilbert space, Higuchi showed that there is a lower bound on the mass of a minimally-coupled free spin-2 field on a curved background. Using the vacuum persistence amplitude, we show that this bound is modified by taking into account additional terms not prohibited by symmetry in the case of a maximally symmetric spacetime. This result can further be generalized to the maximally symmetric space case, such as the FRW universe, and its corresponding bound of the deformation parameter is discussed.
Author
Sungmin Hwang
(Technical University of Munich)
Co-author
Mr
Dennis Schimmel
(Ludwig Maximilian University of Munich)
